Mitchell Robinson Trolls Celtics Fan Over NBA Playoffs Loss to Knicks in Photo After Boston Contract

Mitchell Robinson joined the Boston Celtics this offseason, but that isn't stopping him from trolling the team's fans.

A fan criticized his free-throw shooting in the comments on the Celtics' Instagram announcement of Robinson's arrival on Thursday, which prompted the big man to point out that he and his New York Knicks teammates eliminated Boston in the last playoff series they faced each other:

While the Knicks won the championship this past season without facing the Celtics in the playoffs, the two Eastern Conference rivals played each other in the second round of the 2025 playoffs.

Boston consistently fouled him throughout that series in an effort to exploit his poor free-throw shooting. He even had a memorable airball on one attempt during Game 3 on his way to a 4-of-12 mark from the line.

Yet the Knicks prevailed in the series with four wins in six games.

Robinson shot just 45.2 percent on his free throws in that series but still averaged 8.0 rebounds in 20.7 minutes a night. His ability to come off the bench and dominate the boards for short stretches made him a valuable part of the rotation, and Boston's front office surely knew that because it signed him this offseason.

Yet it seems like Robinson still has to win some Celtics fans over given the comments on the Instagram post.