The statement said Maxwell was being held in custody pending his initial appearance before a judge.
In September, Bruce Maxwell became the first Major League Baseball player to kneel as a protest during the national anthem.
Teammate Mark Canha, who is white, put his right hand on one of Maxwell's shoulders and the two hugged after the anthem finished. "This is really upsetting, as he was given full service; I didn't even know who Bruce Maxwell was", Matt Henry of Keegan's Public House said in an interview.
Maxwell hit.237 with three home runs and 22 RBIs in 76 games this season. That's the situation Oakland A's catcher Bruce Maxwell finds himself in.
Maxwell made his major-league debut with the A's in July 2016.