Grizzlies, Celtics trade Xavier Tillman, Lamar Stevens

The Boston Celtics have acquired forward/center Xavier Tillman in a trade with the Memphis Grizzlies for forward Lamar Stevens and two future second-round draft picks. Tillman (6-8, 245) has appeared in 34 games (13 starts) with the Grizzlies this season and is averaging 6.0 points, 4.6 rebounds, and a career-high 1.7 assists while shooting 40.8 …