The San Francisco 49ers signed former Heisman Trophy-winning QB Troy Smith on Monday, two days after he was cut by the Baltimore Ravens.

The 49ers cut QB Nate Davis to make room for him.

Smith appeared in 14 games for the Ravens in the past three seasons. He was a contender to win the starting job that went to Joe Flacco in 2008.

49ers coach Mike Singletary said recently he wasn't sure if the team would keep Davis, who did not throw a pass in his rookie season last year.

-- Sean Leahy