McMahon went 2-for-4 with a grand slam and an additional RBI in Wednesday's 9-2 win over Tampa Bay.
McMahon extended New York's lead to 2-0 in the second inning with a two-out RBI single before breaking the game open with a grand slam off Mason Englert in the third. It was a much-needed performance for McMahon, who'd gone just 1-for-17 in six games prior to Wednesday. Overall, he's slashing .210/.276/.352 across 356 plate appearances this year with 11 homers, 40 RBI and 32 runs scored.