SANTA CLARA -- The 49ers are one of four teams interested in Seattle free-agent left tackle Russell Okung, according to the NFL Network.
Okung, who is representing himself in free agency, is considered one of the top tackles in the league when he's healthy. One of his issues, however, has been staying on the field. He's never started all 16 games in the regular season since being taken with the sixth overall pick in the 2011 draft. Okung, 28, started 13 games last year and 14 the year prior.
The Lions, Giants and Seahawks also are in the mix for Okung (6-5, 310), per the NFL Network.
The 49ers have a top-tier left tackle in Joe Staley, who is signed through the 2019 season. As of now, they are planning on going into the season with second-year player Trent Brown as their right tackle. According to Pro Football Focus, Okung has played six snaps at right tackle over his career.
Another right-tackle candidate is Anthony Davis, the 49ers’ starter from 2010-2014 who took last season off to mend his body. Davis has indicated on multiple occasions that he plans to play in 2016 but has not yet filed for reinstatement.
He would be under contract with the 49ers if he does re-enter the NFL.