Maxwell was the only player in Major League Baseball to take a knee this year during the national anthem to protest racial injustice.
Scottsdale police say officers went to Maxwell’s home Saturday night after getting a call about a person with a gun. Maxwell was booked on charges of aggravated assault with a deadly weapon and disorderly conduct.
Police said Maxwell was held in custody pending an initial court appearance. It wasn’t known if he had an attorney who could comment on his behalf.
TMZ Sports first reported the arrest.
The 26-year-old Maxwell hit .237 with three home runs and 22 RBIs in 76 games this season. He was projected to be Oakland’s starting catcher next year.