And who is Renardo Foster?
Foster entered the NFL as an undrafted rookie free agent, signed by the Atlanta Falcons while current Rams GM Billy Devaney was a personnel guy there. Foster earned some playing with the Falcons that season. The Rams grabbed him off waivers last year and released him as part of their final roster cut down. He spent most of 2009 on the Saints' practice squad.
Foster, a Louisville product and All Big East lineman, is big at 6'7" and 333 lbs. Don't have much of a scouting report on the guy, but did come across this at Pro Football Talk:
...started two games as a rookie with the Falcons in 2007 before tearing his anterior cruciate ligament.
We'll see how it goes this week.