UPDATE (3:30 p.m. on Wednesday) -- The A's officially recalled right-hander Arnold Leon from Triple-A Nashville, the team announced in a press release.
The A's optioned right-hander R.J. Alvarez to Nashville to clear a spot on the 25-man roster.
***
ANAHEIM -- The A’s are calling up right-hander Arnold Leon from Triple-A Nashville, a source confirmed for CSN California.
Oakland is in need of bullpen reinforcements for Wednesday night’s game against the Angels. Their starters haven’t pitched deep into either of the past two games. Dan Otero pitched four innings of relief on Monday night (though manager Bob Melvin mentioned Tuesday that he expects Otero to be available Wednesday).