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For the better part of five-plus months this season, Aaron Boone has been Anthony Volpe’s staunchest defender, often to a fault. 

On Wednesday, as he started José Caballero at shortstop in place of the struggling Volpe, the Yankees manager finally sounded a bit more resigned to reality. 

Boone described the shortstop situation as “day to day.” He said the Yankees would decide who would start Thursday’s series finale after Wednesday’s game. He admitted he was surprised that Volpe had not yet found more sustained success offensively in his third year as a big leaguer. 

And a day after saying he still viewed Volpe as the Yankees shortstop, he hedged more when asked if that was still the case.