Brett Oberholtzer (blister) could begin a rehab assignment this week.
Jake Marisnick (quad) is expected to sit out again on Sunday.
Jose Altuve went 2-for-5 with a three-run homer Saturday in the Astros' 9-3 rout of the A's.
Scott Feldman limited the A's to three runs over 6 2/3 innings Saturday to earn his second win.
Evan Gattis is not in the Astros starting lineup on Saturday.
Robbie Grossman delivered a two-run single in the top of the 11th to help the Astros beat the A's 5-4 on Friday.
Dallas Keuchel was denied a victory after throwing nine scoreless innings Frida against the A's.
Luke Gregerson blew his first save Friday after giving up two runs in the 10th against the A's.
Chad Qualls retired the only batter he faced Friday to pick up his second save against the A's.
Jake Marisnick was scratched from the Astros starting lineup on Friday due to right leg discomfort.
Astros activated RHP Josh Fields from the 15-day disabled list.
Astros optioned INF Jonathan Villar to Triple-A Oklahoma City.
Chris Carter hit his first home run of the season in Wednesday's loss to the Mariners.
Roberto Hernandez surrendered three runs over seven innings in a low-scoring loss to the Mariners.
Brad Peacock's intercostal strain could force him to miss several weeks.