Barton, facing a 3-2 count against New York starter CC Sabathia with the bases loaded and two outs, motioned toward first base following a pitch he deemed to be ball four. Winters, however, stopped Barton in his tracks by calling strike three, at which point Barton slammed his bat to the ground.
"I'm just tired of getting struck out on pitches that aren't strikes," said Barton, who believed the pitch was outside.
A's manager Bob Geren rushed onto the field to share a few words with Winters but returned to the dugout shortly thereafter. It marked Barton's first career ejection.
"I thought it was a good pitch," Sabathia said. "Obviously, he disagreed, but I thought it was a pretty good pitch. He's really patient and makes you throw the ball over the plate."
Adam Rosales, who started the game at shortstop, moved to first in Barton's stead, while Cliff Pennington was brought into the game to play shortstop.
Jane Lee is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.