Jonathan Singleton hit a pair of homers and walked Thursday against the Tigers. Singleton is able to take part in spring training even though he was suspended 50 games for marijuana usage in January. He'll begin serving that penalty with the start of the minor league season. If he plays well upon returning, he might get a look as the Astros' first baseman after the All-Star break.

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.

Jonathan Singleton has been suspended 50 games for violating the minor league baseball drug policy. "I was informed today that I have tested positive for marijuana," Singleton said in a statement. "As a result, I am being suspended for the first 50 games of the 2013 season. I accept the penalty and take full responsibility for my actions. I apologize to my parents, the Houston Astros and (general manager) Jeff Luhnow." The 21-year-old first baseman was acquired from the Phillies in July 2011 as part of a package for Hunter Pence and is generally regarded as one of the game's top prospects.