QB Wallace tells 49ers he's done

Seneca Wallace had a short window to win the San Francisco 49ers' backup quarterback job. He shut that window Thursday, telling the team he has decided to end his comeback attempt.

Wallace, signed last week, did not suit up for the team's preseason finale at the San Diego Chargers. The nine-year veteran faced an uphill battle to make the team after Colt McCoy restructured his contract last weekend and with the team likely to keep rookie B.J. Daniels as the third quarterback or on the practice squad.

Wallace was out of the NFL in 2012 and was released by the New Orleans Saints this month before signing with the 49ers. With Scott Tolzien released Monday, McCoy has wrapped up the No. 2 job behind Colin Kaepernick.