The Athletics have signed Doug Mathis to a minor league deal according to the Triple-A Pacific Coast League transactions page. He signed a minor league deal with the Giants back in April, but apparently became a free agent at some point since then.
Mathis, 28, made 13 starts for San Francisco's Triple-A affiliate and posted a 3.60 ERA in 65 innings. He struck out 7.5 batters per nine innings while walking 4.3 per nine. Mathis appeared in 45 games (six starts) for the Rangers from 2008-2010, pitching to a 4.84 ERA in 87 1/3 innings. The Athletics have a full five-man rotation on the disabled list right now (Brett Anderson, Dallas Braden, Rich Harden, Brandon McCarthy, and Tyson Ross), so Mathis will give them some much needed depth.