Porter wanted to give Villar some time off to rest the thumb, which he injured fielding grounders on Tuesday. The shortstop said he'd be back in the lineup for Thursday's finale.
Villar has been one of the Astros' biggest bright spots this year, hitting .250 with five homers and 13 RBIs. He went 0-for-3 on Tuesday to snap a five-game hitting streak. He had reached base safely in 11 consecutive games prior to that.
Villar entered Wednesday leading the team in home runs, slugging percentage (.510) and OPS (.822), and he led all American League shortstops in home runs and extra-base hits (14), while ranking second in OPS.
Brian McTaggart is a reporter for MLB.com and writes an MLBlog, Tag's Lines. Follow @brianmctaggart on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.