The 1980s Celtics’ championship window closed with injuries to Kevin McHale’s foot and Larry Bird’s back. The 2008 championship core missed a chance for more when Kevin Garnett was injured in 2009 and Kendrick Perkins went down in 2010.

There have been dozens of times the Celtics star sustained a painful injury, but Tatum would rise to his feet quickly. He couldn’t rise Monday.

Twenty-three seconds later, the Knicks were up 113-104 and Celtics star Jayson Tatum was being helped off the court after suffering a non-contact injury to his lower body.