Villar's X-rays came back negative, and he is still listed as day to day, according to Houston manager Bo Porter. Porter did add that Villar is feeling better.
"He's still a little bit sore," Gonzalez said. "He doesn't know when he's going to be back."
Villar entered Thursday hitting .193 with five home runs and 17 RBIs. Gonzalez was 0-for-3 in his place Wednesday in the Astros' 4-0 los to the Angels.
Brian McTaggart is a reporter for MLB.com and writes an MLBlog, Tag's Lines. Follow @brianmctaggart on Twitter. Mike Vernon is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.