Astros top prospect Jonathan Singleton, who has been suspended 50 games for testing positive for marijuana, will participate in Minor League camp during spring training. Despite the setback though, Astros GM Jeff Lunhow believes that Singleton could reach the majors during the 2013 season. The 21-year-old slugger hit .284/.396/.497 with 21 homers and 79 RBI at Double-A Corpus Christi in 2012, and could be an instant fantasy contributor upon his arrival.