Josh Donaldson hit a solo home run in the sixth inning of the A's 4-3 loss to the Angels on Thursday.
Sonny Gray gave up six hits and allowed three runs against the Angels on Thursday.
Sean Doolittle (intercostal) has yet to resume baseball activities.
The Athletics are pushing Scott Kazmir's next scheduled start back a day from Saturday to Sunday.
Athletics purchased the contract of RHP Evan Scribner from Triple-A Sacramento.
Athletics optioned LHP Drew Pomeranz to Low-A Beloit.
Sam Fuld went 3-for-5 and hit a two-run homer in the top of the ninth as the A's beat the Astros 5-4 on Wednesday.
Drew Pomeranz allowed just an unearned run over 5 1/3 innings and struck out seven against the Astros on Wednesday.
Despite giving up a homer to Chris Carter, Eric O'Flaherty finally recorded his first career save Wednesday against the Astros.
Jed Lowrie (finger) may begin a rehab assignment this weekend.
Athletics recalled LHP Drew Pomeranz from Triple-A Sacramento.
Athletics optioned 1B Nate Freiman to Low-A Beloit.
Jonny Gomes went 2-for-3 with an RBI single and a run scored in Tuesday's loss to the Astros.
Jason Hammel went seven strong innings against the Astros on Tuesday, allowing just one run, but he ended up with a no-decision.
Led Lowrie (finger) will play catch on Tuesday.