Could the Boston Celtics be the dark horse contender in the Giannis Antetokounmpo sweepstakes? According to NBA insider Marc Stein, it's a possibility worth watching closely.

Speaking on Sirius XM's "Deals and Dunks" on Monday, Stein highlighted the Celtics as a team to monitor if the Milwaukee Bucks decide to move on from their two-time MVP after a potentially disappointing 2025-26 season. The key? Boston's newfound salary cap flexibility.

"Because they've created this flexibility for themselves when it looked like it was gonna be really hard to do so — I feel like they're gonna be able to make moves," Stein explained. He noted that this could reignite the perennial debate about whether the Celtics would break up their star duo of Jayson Tatum and Jaylen Brown.

But here's where it gets interesting. Stein revealed that whispers have been circulating throughout the season: "There have been some rumblings at various points during the season that the Celtics could be a stealth Giannis team and a team that potentially interests Giannis."

Given Celtics president Brad Stevens' track record of bold roster moves, Stein cautioned fans to stay alert. "We know Brad Stevens is not afraid to make big moves and take big swings. So I think we have to be ready for just about anything with Boston."

For Celtics fans, this is the kind of speculation that makes an offseason truly exciting. Whether it's keeping the current core intact or making a blockbuster play for a generational talent like Antetokounmpo, one thing is clear: Boston is positioning itself to be a major player in the NBA's ever-shifting landscape.