Astros' Kendall Graveman: Throws off mound

Graveman (shoulder) threw a bullpen session Saturday, Matt Kawahara of the Houston Chronicle reports.

Saturday marks Graveman's first time throwing off a mound since he underwent surgery on his right shoulder during the offseason. He was only able to throw 10 pitches during his first bullpen session, but it's certainly a positive step toward a potential return late in the season.