Jeff Fisher says the plan is for Austin Davis to be his backup quarterback this season.

But nothing is set at this point and the Rams added a more experienced option to the mix when Kellen Clemens agreed to a one-year contract Monday night, according to Mike Garafolo of USA Today. Clemens was the No. 2 behind Sam Bradford last season and spent part of the 2011 season with the Rams, making three starts.

The 29-year-old Clemens will challenge for a roster spot but Fisher seems intent on giving Davis, an undrafted rookie free agent from Southern Miss a year ago, a shot at nailing down that role. The Rams very likely could carry three quarterbacks on the 53-man roster. Davis showed well in preseason last year but did not appear in a regular season game.

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Brad Biggs covers the Bears for the Chicago Tribune