Henderson Alvarez (shoulder) will make his next minor league rehab start on Thursday at Triple-A Nashville.
Danny Valencia (hamstring) is expected to be activated from the disabled list on Friday, the first day he's eligible.
Sam Fuld (shoulder) is facing a 12-15 month recovery.
Jesse Hahn made a statement in his season debut Saturday, holding the Astros scoreless over 6 2/3 innings in the Athletics' 2-0 win.
Ryan Madson loaded the bases with one out but escaped the jam unscathed on Saturday, earning his eighth save of the season against the Astros.
Billy Burns hit a two-run single in the second inning to lead the A's past the Astros on Saturday.
Josh Phegley went 1-for-2 with a double, a walk and a run scored in Saturday's win over the Astros.
Chris Bassitt has been diagnosed with a partially torn UCL in his right elbow and could require Tommy John surgery.
Athletics optioned RHP Andrew Triggs to Triple-A Nashville.
Athletics recalled RHP Jesse Hahn from Triple-A Nashville.
Stephen Vogt is not in the Athletics starting lineup for Saturday's game against the Astros.
Yonder Alonso hit a three-run homer off Pat Neshek in the bottom of the ninth to give the A's a 7-4 win over the Astros on Friday.
Sean Manaea yielded four runs in five-plus innings against the Astros in his major league debut Friday.
Danny Valencia (hamstring) ran sprints on Thursday and has continued to hit off of a tee and pitching machine.
Sam Fuld announced Friday that he'll undergo season-ending surgery to repair a torn rotator cuff.