MLB.com’s Corey Brock tweets that Mark Prior has signed with Orange County of the independent Golden Baseball League.

In June, the 29-year-old right-handed pitcher worked out in front of Major League clubs at the University of Southern California. At the time, Tom Krasovic of AOL Fanhouse said via Twitter, “Veteran scout: Mark Prior “just all right” in today’s throwing session.”

There were rumors in mid-May about Prior starting comback. At the time he took a line drive off of his pitching shoulder when throwing batting practice to a local team. He was shutdown for three weeks after the incident.

Prior last pitched for the Cubs in 2006 when he went 1-6 in nine games. He has a career 42-29 record with a 3.51 ERA.  He had a promising start, but his career was derailed with several injuries.