Boston's No. 4 prospect was 4-for-5 with a homer and three RBIs as Pawtucket routed Indianapolis, 13-2, on Tuesday.
Lavarnway started off hot, smacking a first-inning double and scored Mauro Gomez's homer two batters later. The 2008 sixth-round pick singled and scored on Alex Hassan's RBI single in the second. After fanning in the third, Lavarnway slugged his fourth homer of the season, a three-run blast in the fifth before singling and scoring in his final at-bat in the seventh.
Lavarnway has hit the ball well of late, batting .524 (11-for-21) with four extra-base hits and five RBIs over his last five games. Overall this season, the 24-year-old catcher is batting .301 with 21 RBIs in 44 games for the Red Sox. He entered Tuesday's contest with 12 extra-base hits.
Ryan Kalish, working his way back from a torn labrum , was 2-for-2 with a homer, three RBIs, three runs scored and three walks while Gomez drove in three runs.
Daisuke Matsuzaka, coming back from Tommy John surgery last June, allowed a run on three hits over 1 1/3 innings. Mark Prior struck out five over 1 2/3 innings of relief, and Justin Germano improved to 6-3 after yielding a run on five hits over six innings.