Sheffield was also hit by Curtis Leskanic in the bottom of the 12th before the Yankees won it 5-4 in the 13th.
Right before Sheffield was hit in the first on a 2-2 count, the Yankees slugger stepped out of the batter's box as Martinez was preparing
Sheffield took a couple of steps toward the mound before plate umpire Jim Wolf and catcher Jason Varitek got in the way. Wolf
immediately warned both benches against further
Sheffield walked slowly toward first base, carrying his bat. He
pointed at his chest and jawed at Martinez, who stood on the mound
without showing any emotion. No one left either dugout as a
boisterous sellout crowd loudly booed.
Varitek walked with Sheffield all the way to the bag. About
halfway down the line, Sheffield finally dropped his bat.
When play resumed, Martinez struck out Alex Rodriguez to end the inning.
The Yankees began the night with a 7½-game lead over Boston and trying for a three-game sweep.
In October in Game 3 of the AL championship series, the heated rivalry between the teams reached a peak when Martinez threw behind Karim Garcia's head. In the bottom half of the inning, Martinez tossed down charging Yankees bench coach Don Zimmer during a bench-clearing scuffle that began when Roger Clemens threw high to Manny Ramirez.
Martinez pitched at Yankee Stadium earlier this season without incident. He threw seven shutout innings and beat New York 2-0 on April 25.