Bixler was recalled from Triple-A on Friday when Marwin Gonzalez was placed on the paternity list, which per Major League policy is a maximum of three days.
Astros manager Brad Mills said on Friday that he liked that Bixler can play a multitude of positions, and was impressed how Bixler dealt with being sent to Triple-A after making the team out of Spring Training.
"He can do it all," Mills said. "It's nice to see him get rewarded for going down there with a great attitude. He's a great kid."
In 12 games at Oklahoma City, Bixler hit .423 with two home runs and four RBIs. He had three doubles, a triple and a .483 on-base percentage.
Since being recalled on Friday, Bixler made one plate appearance for the Astros, popping out to short in the eighth inning on Saturday.
The Astros will need to make another roster move on Monday if Gonzalez returns from the paternity list as expected. Houston currently is carrying 13 pitchers.