Astros Put Abreu, Maton on IL Amid Injury Issues

First baseman Jose Abreu placed on IL with back inflammation and received cortisone shots.
Reliever Phil Maton also placed on IL but no diagnosis yet.
Abreu has struggled this season with .234 average and .634 OPS.
Jon Singleton and Yainer Diaz likely fill in at first, bullpen will rely on Graveman, Neris, Abreu, and Pressly.
Injuries hampering Astros as they try to defend World Series title.