Singleton is not in the lineup for Sunday's game against the Angels, Brian McTaggart of MLB.com reports.
The Astros will go with Yainer Diaz at first base and Victor Caratini at catcher as they try to close out a four-game sweep of the Angels. Singleton has been out of the lineup for three straight contests, although Sunday marks the first of those three games in which Houston has faced a right-handed starting pitcher.