(CNN) -- Alex Rodriguez's fight against his 211-game suspension by Major League Baseball has officially begun.
The Major League Baseball Players Association on Wednesday filed a grievance on his behalf, appealing the suspension that MLB levied two days earlier after an investigation into the use of performance-enhancing drugs, MLBPA spokesman Greg Bouris said.
The New York Yankees third baseman can play while the suspension is appealed. He went 1-for-5 at the plate Wednesday night in a 6-5 loss to the White Sox in Chicago.
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