SANTA CLARA -- The 49ers' quarterback corps certainly doesn't seem like the most stable bunch, and further evidence came Tuesday when they worked out former Arizona Cardinals quarterback John Skelton, a league source confirmed.

Skelton played the past three seasons with the Cardinals, and he threw for 282 yards and three touchdown passes in a Dec. 11, 2011 win over the 49ers. The Cincinnati Bengals cut Skelton on Saturday, preferring Josh Johnson to back up Andy Dalton. Skelton was 15 of 25 for 230 yards with one touchdown, no interceptions and a team-high 103.7 passer rating in the exhibition season.

Skelton is 8-9 all-time as a starter, including a 1-5 mark last season in place of an injured Kevin Kolb. The 6-foot-5 Fordham product has 15 career touchdown passes and 25 interceptions.

Colt McCoy, who played the past three seasons with the Browns, and rookie B.J. Daniels are Colin Kaepernick's backups entering Sunday's season opener against the Green Bay Packers.

In the past week, the 49ers cut Scott Tolzien and Seneca Wallace from their roster, and both quarterbacks have since signed with the Packers.

ESPN's Ed Werder reported earlier Tuesday that Wallace was under the impression the 49ers would re-sign him after the season's first week, when his salary wouldn't be fully guaranteed.

For more on the 49ers, see Cam Inman's Hot Read blog at blogs.mercurynews.com/49ers. Follow him on Twitter at twitter.com/CamInman.



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