Tatum has 34 as Celtics avoid sweep with win over Heat in Game 4

MIAMI (AP) — Jayson Tatum had 34 points and 11 rebounds, Derrick White and Jaylen Brown each added 16 points and the Boston Celtics staved off elimination in the Eastern Conference finals by running away in the second half to beat the Miami Heat 116-99 in Game 4 on Tuesday night. Grant Williams scored 14, Al Horford added 12 and Marcus Smart scored 11 for the Celtics, who still trail the series 3-1 — but sent it back to Boston for a Game 5 on Thursday. Jimmy Butler scored 29 for Miami, which led by nine in the second half…