The Washington Nationals may have found their most valuable trade asset in an unexpected place: a 30-year-old left-handed pitcher who has been dominating since returning from Japan.

Foster Griffin, who signed a one-year, $5.5 million deal with the Nationals this offseason, has been nothing short of sensational. Through his first few starts, he's posted a sparkling 2.27 ERA, including three consecutive quality outings. According to Bleacher Report's Kerry Miller, Griffin is "a virtual lock for the trade block" as the July deadline approaches.

What makes Griffin such an intriguing piece? His success isn't a fluke. Over the past three seasons pitching for the Yomiuri Giants in Japan's Nippon Professional Baseball, he compiled a stellar 2.57 ERA. That experience has clearly translated back to the majors, where he's making hitters look uncomfortable at the plate.

The Nationals are in a familiar rebuilding phase. Since winning the World Series in 2019, they haven't returned to the postseason. New president of baseball operations Paul Toboni is tasked with getting the franchise back to contention, which means the team's young roster—including potential trade candidates like CJ Abrams and James Wood—could see movement. But Griffin, with his affordable contract and proven track record, might be the most logical piece to move.

Griffin originally made his MLB debut with the Kansas City Royals in 2020 before heading to Japan. Now back in affiliated baseball, he's showing exactly why teams should be interested. For a contender looking to add a reliable left-handed arm to their bullpen or rotation, Griffin could be the perfect mid-season pickup.

Whether he stays in Washington or becomes a key trade chip, one thing is clear: this lefty is pitching like a man on a mission.