The 49ers have signed ex-Rams quarterback Jamie Martin, an indication that Alex Smith will go on injured reserve. Martin's agent Tom Mills said he has just faxed the necessary paperwork and the deal is complete.
Martin, 38, appears to be the only quarterback the 49ers targeted. He has a long history with Mike Martz, including two stints with Rams when Martz was the head coach and one with the Redskins when Martz was the team's quarterbacks coach.
-- Matt Barrows