Jackson, who has started at left tackle protecting QB Matthew Stafford the past two seasons, was scheduled to be an unrestricted free agent this spring

The Los Angeles Rams and offensive tackle Alaric Jackson have agreed to three-year, $57 million contract, with $37 million guaranteed, a source told ESPN's Jeremy Fowler on Friday.

Just a few hours after agreeing to a contract restructure with quarterback Matthew Stafford, the Los Angeles Rams also locked in his blind-side protector. Per a league source, L.A. will extend starting left tackle Alaric Jackson on a three-year deal.