UPDATE (10:30 a.m. on Thursday) -- The A's officially called up right-handed starter Chris Bassitt from Triple-A Nashville, the team announced in a press release on Thursday.
To clear a spot on the 25-man roster, the team optioned right-handed reliever Arnold Leon to Triple-A.
ANAHEIM -- The revolving door on the A’s pitching staff continues, as two sources confirmed to CSN California that right-hander Chris Bassitt will be called up from Triple-A Nashville on Thursday.
Arnold Leon, called up on Wednesday, made his major league debut when he handled the ninth inning of Oakland’s 9-2 victory over the Los Angeles Angels. Leon was optioned out after the game, so the A’s have an open spot on their 25-man roster.
[INSTANT REPLAY: A's return favor, beat Angels 9-2]
They are scrambling to maintain their bullpen depth during this four-game series. Reliever Jesse Chavez is making a spot start Thursday in place of Jesse Hahn, who has a blister on his pitching hand. Hahn is only expected to miss one start, but in the short term, the A’s are a man short in the bullpen.
Bassitt competed for a rotation spot in the spring but was sent to the minors to work on pitching more effectively to left-handers. He is 1-1 with a 3.38 ERA in three games (two starts) with Nashville.