MEMPHIS, Tenn. (AP) — Ray Allen hit a key 3-point shot in overtime and Paul Pierce scored 28 points as the Boston Celtics held off a furious rally by the Memphis Grizzlies for a 116-110 win Saturday night. Rudy Gay's short pull-up jump shot for Memphis with 7.3 seconds left in regulation tied it at 99. Celtics forward Glen Davis hit a jump shot and Allen dropped in an arching 3-pointer to give the Celtics a 104-99 advantage. Pierce made four free throws in the final 1:30 to seal Boston's seventh win in its last eight games. The Celtics finished their four-game road trip 3-1. Gay had 22 points for the Grizzlies, who had trailed by as much as 11.