David Aardsma placed on the DL

The Red Sox have lost their one solid point in the bullpen (besides Jonathan Papelbon) for at least 15 days. David Aardsma is suffering from an undisclosed leg injury and has been put on the disabled list. His numbers this season include a 2.75 ERA and an impressive 41 strikeouts in only 39.1 innings. Justin Masterson has been called up to take Aardsma's place on the roster. Masterson was sent back down to Pawtucket a few weeks ago so that he could become accustomed to working out of the bullpen. His numbers as a reliever in Triple-A this year are: 3.1 IP, 2ER, 2H, 4K.