Oakland A's designated hitter Billy Butler suffered a concussion in a fight with teammate Danny Valencia on Friday after the third baseman punched him in the temple, according to a San Francisco Chronicle report.
While details of the fight have not been revealed publicly, the Chronicle reported Monday, citing multiple sources who were present, that it began before batting practice over what Butler apparently said to Valencia while an equipment representative was in the clubhouse.
According to the Chronicle, Butler had interrupted Valencia's conversation with the equipment rep to say Valencia regularly uses spikes that are in breach of his contract, adding that the rep's company should terminate Valencia's endorsement deal.