Posted by ESPN.com's Mike Sando
Frerotte's signing has been expected. He'll give the Rams an experienced backup for Marc Bulger, presumably at a reasonable price.
A quick look at quarterback depth charts in the NFC West, assuming Frerotte signs:
San Francisco: Shaun Hill's name is penciled into the No. 1 role for the first minicamp, but the team has not named a starter for the regular season. Alex Smith will compete for the job. Damon Huard is the third quarterback.
St. Louis: Bulger is the starter. Frerotte becomes the backup. Brock Berlin is the third quarterback.