Astros' Spencer Arrighetti: Suffers broken thumb

Arrighetti was diagnosed with a fractured right thumb after being struck by a ball during batting practice Monday, Matt Kawahara of the Houston Chronicle reports.

The 25-year-old right-hander was the victim of a freak accident prior to Monday's game in Seattle, as he was in the outfield playing catch before being drilled by a line drive. A timetable for Arrighetti's return has yet to be established, though he'll presumably miss at least a month, and possibly longer depending on whether surgery is required.