Headley's homer came on a 2-2 pitch to open the fifth inning -- Alex Rodriguez immediately followed with his 15th home run of the season in a back-to-back effort -- and was the catalyst of an inning that eventually saw the Yankees tie the game at 6 after trailing by three runs.
Heading into Tuesday's matchup with the Phillies, Headley was hitting .253 with 25 RBIs.