Ex-Wisconsin star John Blackwell is headed to one of college basketball's bluebloods.

Blackwell has committed to Duke for his senior season, he announced April 21 on social media.

The 6-foot-4 guard entered the transfer portal while exploring his NBA draft opportunities after playing his first three seasons at Wisconsin. He described the decision to leave UW at the time as "one of the hardest decisions I've ever had to make because my experience here has been nothing short of incredible."

Blackwell averaged a career-high 19.1 points per game in 2025-26 as part of an impressive guard tandem with Nick Boyd. He also had five games with 30-plus points, including back-to-back Big Ten tournament games.

Blackwell was one of four UW players to depart via the transfer portal. UW also lost starting forward Aleksas Bieliauskas and reserve forwards Jack Robison and Riccardo Greppi. Bieliauskas committed to South Carolina, and Robison committed to North Dakota State.

Mar 7, 2026; West Lafayette, Indiana, USA; Wisconsin Badgers guard John Blackwell (25) points and laughs at fans after beating the Purdue Boilermakers at Mackey Arena. Mandatory Credit: Jacob Musselman-Imagn ImagesWisconsin guard John Blackwell (25) is unable to score on Michigan center Aday Mara (15) during the second half of their semifinal game in the Big Ten tournament Saturday, March 14, 2026 at the United Center in Chicago, Illinois. Michigan beat Wisconsin 68-65.Wisconsin head coach Greg Gard talks with guard John Blackwell (25) during the second half of their quarterfinal game in the Big Ten tournament Friday, March 13, 2026 at the United Center in Chicago, Illinois. Wisconsin beat Illinois 91-88.Wisconsin guard John Blackwell (25) misses a three-point basket during overtime of their quarterfinal game in the Big Ten tournament Friday, March 13, 2026 at the United Center in Chicago, Illinois. Wisconsin beat Illinois 91-88.Wisconsin guard John Blackwell (25) reacts after Wisconsin guard Nick Boyd (2) was fouled during the second half of their quarterfinal game in the Big Ten tournament Friday, March 13, 2026 at the United Center in Chicago, Illinois. Wisconsin beat Illinois 91-88.Mar 12, 2026; Chicago, IL, USA; Wisconsin Badgers guard John Blackwell (25) shoots against Washington Huskies during the second half at United Center. Mandatory Credit: Kamil Krzaczynski-Imagn ImagesWisconsin guard John Blackwell (25) cores one Iowa forward Alvaro Folgueiras (7) during the second half of the game Sunday, February 22, 2026 at the Kohl Center in Madison, Wisconsin. Wisconsin beat Iowa 84-71.Wisconsin guard John Blackwell (25) drives on Michigan State guard Kur Teng (2) during the second half of their game Friday, February 13, 2026 at the Kohl Center in Madison, Wisconsin. Wisconsin beat 10th ranked Michigan State 92-71.MADISON, WISCONSIN - FEBRUARY 13: John Blackwell #25 of the Wisconsin Badgers celebrates with Nick Boyd #2 during a scoring run in the first half against the Michigan State Spartans at Kohl Center on February 13, 2026 in Madison, Wisconsin. (Photo by John Fisher/Getty Images)Wisconsin guard John Blackwell (25) hits a three-point basket as Ohio State head coach Jake Diebler looks on during the first half of their game Saturday, January 31, 2026 at the Kohl Center in Madison, Wisconsin.Wisconsin guard John Blackwell (25) reacts after hitting a three-point basket during the waning moments of the second half of their game Wednesday, January 28, 2026 at the Kohl Center in Madison, Wisconsin. Wisconsin beat Minnesota 67-63.Wisconsin guard John Blackwell (25) relays a play during the second half of their game Sunday, January 25, 2026 at the Kohl Center in Madison, Wisconsin. USC beat Wisconsin 73-71.Wisconsin guard John Blackwell (25) and guard Nick Boyd (2) celebrate an upset of the Michigan Wolverines in an NCAA basketball game on on Saturday, Jan. 10, 2026, at Crisler Center in Ann Arbor, Michigan.Wisconsin head coach Greg Gard talks with guard John Blackwell (25) during the second half of their game Friday, December 19, 2025 at Fiserv Forum in Milwaukee, Wisconsin. Villanova beat Wisconsin 76-66 in overtime.Wisconsin guard John Blackwell (25) and guard Nick Boyd (2) are shown during the waning moment of their game Saturday, December 6, 2025 at the Kohl Center in Madison, Wisconsin. Wisconsin beat Marquette 96-76.Wisconsin guard John Blackwell (25) celebrates his three-point basket during the first half of their game against the Northwestern Wednesday, December 3, 2025 at the Kohl Center in Madison, Wisconsin.Wisconsin guard John Blackwell (25) scores during the second half of their game Friday, December 19, 2025 at Fiserv Forum in Milwaukee, Wisconsin. Villanova beat Wisconsin 76-66 in overtime.Nov 28, 2025; San Diego, CA, USA; Wisconsin Badgers guard John Blackwell (25) shoots the ball against Texas Christian University Horned Frogs during the first half at Jenny Craig Pavilion. Mandatory Credit: Abe Arredondo-Imagn ImagesMADISON, WISCONSIN - NOVEMBER 17: John Blackwell #25 of the Wisconsin Badgers shoots and scores a three-pointer over Jo Valrie #33 of the SIUE Cougars during the second half at Kohl Center on November 17, 2025 in Madison, Wisconsin. (Photo by John Fisher/Getty Images)Wisconsin Badgers guard John Blackwell (25) and Wisconsin Badgers forward Steven Crowl (22) react to a call Saturday, March 15, 2025, in a semifinals game at the 2025 TIAA Big Ten Men’s Basketball Tournament between the Michigan State Spartans and the Wisconsin Badgers at Gainbridge Fieldhouse in Indianapolis.Mar 14, 2025; Indianapolis, IN, USA; Wisconsin Badgers guard Max Klesmit (11) and Wisconsin Badgers guard John Blackwell (25) celebrate after a play during the first half against the UCLA Bruins at Gainbridge Fieldhouse. Mandatory Credit: Robert Goddin-Imagn ImagesMar 5, 2025; Minneapolis, Minnesota, USA; Wisconsin Badgers guard John Blackwell (25) celebrates his basket against the Minnesota Golden Gophers during the second half at Williams Arena. Mandatory Credit: Matt Krohn-Imagn ImagesMADISON, WISCONSIN - FEBRUARY 25: John Blackwell #25 of the Wisconsin Badgers dribbles up court during the second half of the game against the Washington Huskies at Kohl Center on February 25, 2025 in Madison, Wisconsin. (Photo by John Fisher/Getty Images)MADISON, WISCONSIN - NOVEMBER 03: John Blackwell #25 of the Wisconsin Badgers shoots over the reach of Cam Gregory #7 of the Campbell Fighting Camels during the second half of the game at Kohl Center on November 03, 2025 in Madison, Wisconsin. (Photo by John Fisher/Getty Images)Wisconsin guard John Blackwell (25) passes the ball during the second half of their game against Campbell Monday, November 3, 2025 at the Kohl Center in Madison, Wisconsin.Wisconsin guard John Blackwell (25) drive along the baseline during the second half of their game Friday, November 17, 2023, at the Kohl Center in Madison, Wisconsin. Wisconsin beat Robert Morris 78-68.Wisconsin guard John Blackwell (25) scores on Robert Morris guard Justice Williams (1) during the second half of their game Friday, November 17, 2023, at the Kohl Center in Madison, Wisconsin. Wisconsin beat Robert Morris 78-68.Wisconsin Badgers guard John Blackwell (25) shoots the ball over Southern Methodist Mustangs forward Ja'Heim Hudson (15) in the second half during the Fort Myers Tip-Off championship game on November 22, 2023, at Suncoast Credit Union Arena in Fort Myers, Fla.Indiana Hoosiers guard Trey Galloway (32) blocks the shot from Wisconsin Badgers guard John Blackwell (25) during the second half of their game on Friday January 19, 2024, at the Kohl Center in Madison, Wis.Wisconsin guard John Blackwell (25) tries to swat the all away from UW-River Falls guard Gavin Ralph (10) during the first half of their preseason game Wednesday, October 30, 2024, at the Kohl Center in Madison, Wisconsin.Wisconsin guard John Blackwell (25) scores on Michigan center Danny Wolf (1) during the second half of their game Tuesday, December 3, 2024, at the Kohl Center in Madison, Wisconsin. Michigan beat Wisconsin 67-64.Wisconsin Badgers guard John Blackwell (25) drives to the net against Arizona Wildcats guard KJ Lewis (5) during the first half on December 9, 2024, at McKale Center in Tucson, Arizona.John Blackwell (25) of the Wisconsin Badgers goes to the basket for a score in the second half of the game against the Iowa Hawkeyes at Kohl Center on January 3, 2025 in Madison, Wisconsin.Rutgers Scarlet Knights guard Jeremiah Williams (25) goes to the basket against Wisconsin Badgers forward Xavier Amos (13) and guard John Blackwell (25) during the second half on January 6, 2025, at Jersey Mike's Arena in Piscataway, New Jersey.John Blackwell (25) of the Wisconsin Badgers drives to the basket during the second half of the game against the Ohio State Buckeyes at Kohl Center on January 14, 2025 in Madison, Wisconsin.Wisconsin guard John Blackwell (25) shoots a three point basket against Michigan State guard Tre Holloman (5) during the first half of Big Ten Tournament semifinal at Gainbridge Fieldhouse in Indianapolis, Ind. on Saturday, March 15, 2025.Wisconsin guard John Blackwell (25) is shown during the second half of their game Tuesday, November 11, 2025 at the Kohl Center in Madison, Wisconsin. Wisconsin beat Ball State 86-55.MADISON, WISCONSIN - DECEMBER 03: John Blackwell #25 of the Wisconsin Badgers goes to the basket on Tre Singleton #8 of the Northwestern Wildcats during the second half at Kohl Center on December 03, 2025 in Madison, Wisconsin. (Photo by John Fisher/Getty Images)Wisconsin guard John Blackwell (25) attempts a three-point basket during the second half of their game Saturday, December 6, 2025 at the Kohl Center in Madison, Wisconsin. Wisconsin beat Marquette 96-76.Wisconsin guard John Blackwell (25) celebrates his three-point basket during the first half of their game against the Northwestern Wednesday, December 3, 2025 at the Kohl Center in Madison, Wisconsin. Mark Hoffman/Milwaukee Journal Sentinel1 / 40Wisconsin basketball's John Blackwell is a key player again this seasonMar 7, 2026; West Lafayette, Indiana, USA; Wisconsin Badgers guard John Blackwell (25) points and laughs at fans after beating the Purdue Boilermakers at Mackey Arena. Mandatory Credit: Jacob Musselman-Imagn Images1 / 40Wisconsin basketball's John Blackwell is a key player again this seasonMar 7, 2026; West Lafayette, Indiana, USA; Wisconsin Badgers guard John Blackwell (25) points and laughs at fans after beating the Purdue Boilermakers at Mackey Arena. Mandatory Credit: Jacob Musselman-Imagn Images2 / 40Wisconsin basketball's John Blackwell is a key player again this seasonWisconsin guard John Blackwell (25) is unable to score on Michigan center Aday Mara (15) during the second half of their semifinal game in the Big Ten tournament Saturday, March 14, 2026 at the United Center in Chicago, Illinois. Michigan beat Wisconsin 68-65.3 / 40Wisconsin basketball's John Blackwell is a key player again this seasonWisconsin head coach Greg Gard talks with guard John Blackwell (25) during the second half of their quarterfinal game in the Big Ten tournament Friday, March 13, 2026 at the United Center in Chicago, Illinois. Wisconsin beat Illinois 91-88.4 / 40Wisconsin basketball's John Blackwell is a key player again this seasonWisconsin guard John Blackwell (25) misses a three-point basket during overtime of their quarterfinal game in the Big Ten tournament Friday, March 13, 2026 at the United Center in Chicago, Illinois. Wisconsin beat Illinois 91-88.5 / 40Wisconsin basketball's John Blackwell is a key player again this seasonWisconsin guard John Blackwell (25) reacts after Wisconsin guard Nick Boyd (2) was fouled during the second half of their quarterfinal game in the Big Ten tournament Friday, March 13, 2026 at the United Center in Chicago, Illinois. Wisconsin beat Illinois 91-88.6 / 40Wisconsin basketball's John Blackwell is a key player again this seasonMar 12, 2026; Chicago, IL, USA; Wisconsin Badgers guard John Blackwell (25) shoots against Washington Huskies during the second half at United Center. Mandatory Credit: Kamil Krzaczynski-Imagn Images7 / 40Wisconsin basketball's John Blackwell is a key player again this seasonWisconsin guard John Blackwell (25) cores one Iowa forward Alvaro Folgueiras (7) during the second half of the game Sunday, February 22, 2026 at the Kohl Center in Madison, Wisconsin. Wisconsin beat Iowa 84-71.8 / 40Wisconsin basketball's John Blackwell is a key player again this seasonWisconsin guard John Blackwell (25) drives on Michigan State guard Kur Teng (2) during the second half of their game Friday, February 13, 2026 at the Kohl Center in Madison, Wisconsin. Wisconsin beat 10th ranked Michigan State 92-71.9 / 40Wisconsin basketball's John Blackwell is a key player again this seasonMADISON, WISCONSIN - FEBRUARY 13: John Blackwell #25 of the Wisconsin Badgers celebrates with Nick Boyd #2 during a scoring run in the first half against the Michigan State Spartans at Kohl Center on February 13, 2026 in Madison, Wisconsin. (Photo by John Fisher/Getty Images)10 / 40Wisconsin basketball's John Blackwell is a key player again this seasonWisconsin guard John Blackwell (25) hits a three-point basket as Ohio State head coach Jake Diebler looks on during the first half of their game Saturday, January 31, 2026 at the Kohl Center in Madison, Wisconsin.11 / 40Wisconsin basketball's John Blackwell is a key player again this seasonWisconsin guard John Blackwell (25) reacts after hitting a three-point basket during the waning moments of the second half of their game Wednesday, January 28, 2026 at the Kohl Center in Madison, Wisconsin. Wisconsin beat Minnesota 67-63.12 / 40Wisconsin basketball's John Blackwell is a key player again this seasonWisconsin guard John Blackwell (25) relays a play during the second half of their game Sunday, January 25, 2026 at the Kohl Center in Madison, Wisconsin. USC beat Wisconsin 73-71.13 / 40Wisconsin basketball's John Blackwell is a key player again this seasonWisconsin guard John Blackwell (25) and guard Nick Boyd (2) celebrate an upset of the Michigan Wolverines in an NCAA basketball game on on Saturday, Jan. 10, 2026, at Crisler Center in Ann Arbor, Michigan.14 / 40Wisconsin basketball's John Blackwell is a key player again this seasonWisconsin head coach Greg Gard talks with guard John Blackwell (25) during the second half of their game Friday, December 19, 2025 at Fiserv Forum in Milwaukee, Wisconsin. Villanova beat Wisconsin 76-66 in overtime.15 / 40Wisconsin basketball's John Blackwell is a key player again this seasonWisconsin guard John Blackwell (25) and guard Nick Boyd (2) are shown during the waning moment of their game Saturday, December 6, 2025 at the Kohl Center in Madison, Wisconsin. Wisconsin beat Marquette 96-76.16 / 40Wisconsin basketball's John Blackwell is a key player again this seasonWisconsin guard John Blackwell (25) celebrates his three-point basket during the first half of their game against the Northwestern Wednesday, December 3, 2025 at the Kohl Center in Madison, Wisconsin.17 / 40Wisconsin basketball's John Blackwell is a key player again this seasonWisconsin guard John Blackwell (25) scores during the second half of their game Friday, December 19, 2025 at Fiserv Forum in Milwaukee, Wisconsin. Villanova beat Wisconsin 76-66 in overtime.18 / 40Wisconsin basketball's John Blackwell is a key player again this seasonNov 28, 2025; San Diego, CA, USA; Wisconsin Badgers guard John Blackwell (25) shoots the ball against Texas Christian University Horned Frogs during the first half at Jenny Craig Pavilion. Mandatory Credit: Abe Arredondo-Imagn Images19 / 40Wisconsin basketball's John Blackwell is a key player again this seasonMADISON, WISCONSIN - NOVEMBER 17: John Blackwell #25 of the Wisconsin Badgers shoots and scores a three-pointer over Jo Valrie #33 of the SIUE Cougars during the second half at Kohl Center on November 17, 2025 in Madison, Wisconsin. (Photo by John Fisher/Getty Images)20 / 40Wisconsin basketball's John Blackwell is a key player again this seasonWisconsin Badgers guard John Blackwell (25) and Wisconsin Badgers forward Steven Crowl (22) react to a call Saturday, March 15, 2025, in a semifinals game at the 2025 TIAA Big Ten Men’s Basketball Tournament between the Michigan State Spartans and the Wisconsin Badgers at Gainbridge Fieldhouse in Indianapolis.21 / 40Wisconsin basketball's John Blackwell is a key player again this seasonMar 14, 2025; Indianapolis, IN, USA; Wisconsin Badgers guard Max Klesmit (11) and Wisconsin Badgers guard John Blackwell (25) celebrate after a play during the first half against the UCLA Bruins at Gainbridge Fieldhouse. Mandatory Credit: Robert Goddin-Imagn Images22 / 40Wisconsin basketball's John Blackwell is a key player again this seasonMar 5, 2025; Minneapolis, Minnesota, USA; Wisconsin Badgers guard John Blackwell (25) celebrates his basket against the Minnesota Golden Gophers during the second half at Williams Arena. Mandatory Credit: Matt Krohn-Imagn Images23 / 40Wisconsin basketball's John Blackwell is a key player again this seasonMADISON, WISCONSIN - FEBRUARY 25: John Blackwell #25 of the Wisconsin Badgers dribbles up court during the second half of the game against the Washington Huskies at Kohl Center on February 25, 2025 in Madison, Wisconsin. (Photo by John Fisher/Getty Images)24 / 40Wisconsin basketball's John Blackwell is a key player again this seasonMADISON, WISCONSIN - NOVEMBER 03: John Blackwell #25 of the Wisconsin Badgers shoots over the reach of Cam Gregory #7 of the Campbell Fighting Camels during the second half of the game at Kohl Center on November 03, 2025 in Madison, Wisconsin. (Photo by John Fisher/Getty Images)25 / 40Wisconsin basketball's John Blackwell is a key player again this seasonWisconsin guard John Blackwell (25) passes the ball during the second half of their game against Campbell Monday, November 3, 2025 at the Kohl Center in Madison, Wisconsin.26 / 40Wisconsin basketball's John Blackwell is a key player again this seasonWisconsin guard John Blackwell (25) drive along the baseline during the second half of their game Friday, November 17, 2023, at the Kohl Center in Madison, Wisconsin. Wisconsin beat Robert Morris 78-68.27 / 40Wisconsin basketball's John Blackwell is a key player again this seasonWisconsin guard John Blackwell (25) scores on Robert Morris guard Justice Williams (1) during the second half of their game Friday, November 17, 2023, at the Kohl Center in Madison, Wisconsin. Wisconsin beat Robert Morris 78-68.28 / 40Wisconsin basketball's John Blackwell is a key player again this seasonWisconsin Badgers guard John Blackwell (25) shoots the ball over Southern Methodist Mustangs forward Ja'Heim Hudson (15) in the second half during the Fort Myers Tip-Off championship game on November 22, 2023, at Suncoast Credit Union Arena in Fort Myers, Fla.29 / 40Wisconsin basketball's John Blackwell is a key player again this seasonIndiana Hoosiers guard Trey Galloway (32) blocks the shot from Wisconsin Badgers guard John Blackwell (25) during the second half of their game on Friday January 19, 2024, at the Kohl Center in Madison, Wis.30 / 40Wisconsin basketball's John Blackwell is a key player again this seasonWisconsin guard John Blackwell (25) tries to swat the all away from UW-River Falls guard Gavin Ralph (10) during the first half of their preseason game Wednesday, October 30, 2024, at the Kohl Center in Madison, Wisconsin.31 / 40Wisconsin basketball's John Blackwell is a key player again this seasonWisconsin guard John Blackwell (25) scores on Michigan center Danny Wolf (1) during the second half of their game Tuesday, December 3, 2024, at the Kohl Center in Madison, Wisconsin. Michigan beat Wisconsin 67-64.32 / 40Wisconsin basketball's John Blackwell is a key player again this seasonWisconsin Badgers guard John Blackwell (25) drives to the net against Arizona Wildcats guard KJ Lewis (5) during the first half on December 9, 2024, at McKale Center in Tucson, Arizona.33 / 40Wisconsin basketball's John Blackwell is a key player again this seasonJohn Blackwell (25) of the Wisconsin Badgers goes to the basket for a score in the second half of the game against the Iowa Hawkeyes at Kohl Center on January 3, 2025 in Madison, Wisconsin.34 / 40Wisconsin basketball's John Blackwell is a key player again this seasonRutgers Scarlet Knights guard Jeremiah Williams (25) goes to the basket against Wisconsin Badgers forward Xavier Amos (13) and guard John Blackwell (25) during the second half on January 6, 2025, at Jersey Mike's Arena in Piscataway, New Jersey.35 / 40Wisconsin basketball's John Blackwell is a key player again this seasonJohn Blackwell (25) of the Wisconsin Badgers drives to the basket during the second half of the game against the Ohio State Buckeyes at Kohl Center on January 14, 2025 in Madison, Wisconsin.36 / 40Wisconsin basketball's John Blackwell is a key player again this seasonWisconsin guard John Blackwell (25) shoots a three point basket against Michigan State guard Tre Holloman (5) during the first half of Big Ten Tournament semifinal at Gainbridge Fieldhouse in Indianapolis, Ind. on Saturday, March 15, 2025.37 / 40Wisconsin basketball's John Blackwell is a key player again this seasonWisconsin guard John Blackwell (25) is shown during the second half of their game Tuesday, November 11, 2025 at the Kohl Center in Madison, Wisconsin. Wisconsin beat Ball State 86-55.38 / 40Wisconsin basketball's John Blackwell is a key player again this seasonMADISON, WISCONSIN - DECEMBER 03: John Blackwell #25 of the Wisconsin Badgers goes to the basket on Tre Singleton #8 of the Northwestern Wildcats during the second half at Kohl Center on December 03, 2025 in Madison, Wisconsin. (Photo by John Fisher/Getty Images)39 / 40Wisconsin basketball's John Blackwell is a key player again this seasonWisconsin guard John Blackwell (25) attempts a three-point basket during the second half of their game Saturday, December 6, 2025 at the Kohl Center in Madison, Wisconsin. Wisconsin beat Marquette 96-76.40 / 40Wisconsin basketball's John Blackwell is a key player again this seasonWisconsin guard John Blackwell (25) celebrates his three-point basket during the first half of their game against the Northwestern Wednesday, December 3, 2025 at the Kohl Center in Madison, Wisconsin. Mark Hoffman/Milwaukee Journal SentinelMar 19, 2026; Portland, OR, USA; Wisconsin Badgers guard John Blackwell (25) controls the ball against High Point Panthers forward Terry Anderson (5) during the first half of a first round game of the men's 2026 NCAA Tournament at Moda Center. Mandatory Credit: Craig Strobeck-Imagn ImagesThis article originally appeared on Milwaukee Journal Sentinel: Wisconsin basketball transfer John Blackwell commits to Duke