The Oakland Athletics have called up left-handed pitcher Brad Mills to start Friday night's game against the Baltimore Orioles after skipping Sonny Gray's scheduled Thursday start due to his back spasms. To clear space on the active roster, the A's optioned right handed reliever Arnold Leon to Triple-A. The A's also designated right-handed reliever Taylor Thompson for assignment, meaning there are still 38 players counting against the 40 player limit. 60-day DL players Sean Doolittle and Tyler Ladendorf are both on rehabilitation assignments, with Doolittle expected to rejoin the A's for the next homestand.
Oakland A's call up Brad Mills to start Friday, option Arnold Leon, designate Taylor Thompson for assignment
