The start would be Davis' second in a row. Rams' backup quarterback Shaun Hill injured his quadriceps during the team's 34-6 opening-week loss to the Vikings. The Rams first-string QB, Sam Bradford, is out for the season with a torn ACL.
SI: NFL Week 3 picks
Davis was initially signed as a free agent by the Rams in 2012 after going undrafted. He rejoined St. Louis in October 2013 after a stint with the Miami Dolphins practice squad. Davis completed 22 of 29 passes for 235 yards in St. Louis' week two win over Tampa Bay.
-- Alex Suskind