Martinez went 2-for-5 with a grand slam in Saturday's ALCS Game 2 victory over the Astros.
The Red Sox jumped out to an early lead, with Martinez hitting a grand slam off Luis Garcia in the top of the first inning and Rafael Devers copying that feat in the top of the second against Jake Odorizzi. The homer was Martinez's second this postseason and his eighth in 26 career playoff games.