BY DAVID THORPE

There were 58 seconds left in Game 1 of the Eastern Conference Finals. The Boston Celtics were up two points with the ball. ESPN’s Game Tracker put the Celtics’ win probability at 74.8 percent. Any Celtics score and their odds of winning went into the stratosphere. 

At half court, Celtics point guard Kemba Walker was guarded one-on-one by …