Nov 22, 2009 7:05 PM EST

The Athletics have signed free-agent third baseman Dallas McPherson to a minor league contract.

McPherson, who is invited to spring training, will compete for a starting job in Oakland. The A's used Adam Kennedy, Bobby Crosby and Jack Hannahan at third in 2009.

The 29-year-old once ranked among the game's top prospects, but he missed the entire 2007 and 2009 seasons with back issues.

Via ESPN