Xander Bogaerts led the attack for Boston with three hits and three RBIs. Dustin Pedroia added a two-run double in a four-run sixth inning.
Rick Porcello wasn't at this best, giving up 11 hits and four earned runs over 6 2/3 innings, but it was enough for the righty (3-5, 4.35 ERA) to get the win.
The Rangers out-hit the Red Sox, 13-12, but some sloppy defense hurt their cause, as did Nomar Mazara getting thrown out trying to score from first on a double by Jonathan Lucroy to short-circuit a rally in the seventh.