Seahawks restricted free agent right tackle Garry Gilliam has signed an offer sheet with the NFC West rival 49ers, according to Sheil Kapadia of ESPN.com. It’s a one-year, $2.2MM contract, including $1.4MM in guarantees, report ESPN’s Adam Schefter and Kapadia (Twitter links). Seattle will have five days to match the proposal, but if the team lets Gilliam go, it won’t receive any compensation for the 2014 undrafted free agent because it only assigned him an original-round tender (worth $1.797MM, with nothing guaranteed).

The 49ers hosted Gilliam on a visit last Thursday and subsequently offered him a multiyear deal, but he rejected it. By taking a one-year offer, Gilliam has set himself up to become an unrestricted free agent next offseason at the age of 27.

Since entering the NFL, Gilliam has totaled 30 starts, nearly all of which (29) came over the past two seasons. Gilliam’s performance across 14 appearances last season ranked just 71st among Pro Football Focus‘ 78 qualified tackles, making him one of the least effective parts of one of the league’s worst offensive lines. The 49ers’ O-line was also woeful, though PFF ranked their top right tackle, Trenton Brown (No. 55), higher than Gilliam.

Photo courtesy of USA Today Sports Images.