NEW YORK -- Yankees manager Aaron Boone said first baseman Greg Bird's swing lacks the explosion it had pre-All-Star break, and he has an idea why.
It has something to do with his twice-operated-on ankle.
He's not hurt, Boone said.
"I feel like fatigue is certainly a factor or maybe lack of stamina," the manager said after the Yankees' 3-1 loss to the Rays at Yankee Stadium, a defeat in which Bird popped out on the first pitch he saw despite having the bases loaded, no outs and a new reliever in the game.