Agonizing Jayson Tatum video has fans fearing the worst with Celtics on the brink

As the final minutes Game 4 played on inside Madison Square Garden, Jayson Tatum sat in a wheelchair, hands over his face, while being wheeled to an area for further evaluation. Not long before, the Celtics superstar had crumpled to the floor while attempting to corral a loose ball and laid on the floor in...