RENTON, Wash. -- Back-end roster moves are typical during training camp, but the Seattle Seahawks made a major move Tuesday by signing offensive tackle Eric Winston.

Winston, 30, is an eight-year veteran who has started 119 of the 124 games he has played, including all 16 games last season for the Arizona Cardinals. He also is the president of the NFL Players Association.

Winston played six seasons for the Houston Texans before signing with Kansas City in 2012. He has been working out this summer in Houston with Texans receiver Andre Johnson and running back Arian Foster.

Winston (6-foot-7, 300 pounds) has played most of his NFL career at right tackle, so this could be an indication that the Seahawks aren't comfortable with where things stand at that spot.

Rookie Justin Britt, a second-round draft choice from Missouri, has gotten all the first-team snaps at camp so far. Second-year tackle Michael Bowie, who was expected to compete for the starting job, is out with a shoulder injury.

Britt has looked good in run blocking but has struggled at times on pass blocking. Bringing in Winston gives the Seahawks a proven veteran if they aren’t comfortable starting a rookie right tackle in the NFC West, which is loaded with talented defensive linemen.