The Philadelphia 76ers were playing some of their best defense of the night. Down just two to the Boston Celtics with 95 second left in the game, they got Jayson Tatum to pass out of drive, Nikola Vucevic to swing to Jaylen Brown because he didn’t have an opening to shoot, and Brown to not even try a drive on Paul George. When the ball got back to Tatum, VJ Edgecombe was locked in a defense stance at the Xfinity Mobile Arena logo with seven seconds to go on the clock.  This was going to have to be all Tatum.  A dribble right … six seconds Stop, crossover left … five seconds Whoa, almost lost the dribble … four seconds Pick up the dribble, now with Edgecombe right in his face … three seconds. Pass to Payton Pritchard … two seconds  Wait, WHAT?  “I looked around, I said, ‘Dang, JT, you threw me a grenade,’” Pritchard explained before heading to the team’s Saturday practice. “I like grenades though. So I live for those moments.” Pritchard had no choice but to get free for the shot.…