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49ers sign QB Seneca Wallace

The 49ers have signed quarterback Seneca Wallace. (Diamond Images/Getty Images) The 49ers have signed quarterback Seneca Wallace, who last played a regular season game for the Cleveland Browns in 2011. (Diamond Images/Getty Images)

The San Francisco 49ers have signed quarterback Seneca Wallace, the team announced Thursday. Wallace now jumps into the competition to back up Colin Kaepernick.

Wallace has 21 starts in a career split between the Seahawks and Browns. He was released by the Saints on Tuesday after a poor showing in his last preseason game.

Colt McCoy was expected to win the backup job after the 49ers traded for him this offseason. But McCoy and Scott Tolzien, the two veterans competing for the spot, have struggled. In a preseason game against the Chiefs, they combined to go 6-for-14 for 65 yards and an interception. Their passer rating was 27.4.

Rookie quarterback B.J. Daniels has performed well and likely carved out a spot with the team - either on roster or with the practice squad. His strong play has reportedly put him in competition for the team's No. 2 spot as well.

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But it seems unlikely that Jim Harbaugh and the 49ers would want to trust a Super Bowl-capable roster to a rookie if Kaepernick were to get injured. That means Wallace will likely have a chance to catch on with San Francisco if he can perform well in the short time left in the preseason.

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