The Cleveland Browns signed offensive lineman Ryan Seymour to the active roster from the practice squad after officially placing offensive lineman Alex Mack on injured reserve Friday.

Mack underwent successful surgery to repair a fractured fibula on Thursday in Charlotte, N.C. The Browns said a full recovery is expected by the start of the 2015 season.

Mack started the first 85 games and played 5,279 consecutive offensive snaps to begin his NFL career, with the streak ending in the second quarter against the Pittsburgh Steelers last Sunday. A two-time Pro Bowl selection (2010, 2013), Mack was drafted by the Browns in the first round in 2009.

The 6-foot-4, 305-pound Seymour is officially in his first NFL season out of Vanderbilt. Originally selected by Seattle in the seventh round of the 2013 draft, Seymour joined the Browns this season via waivers from San Francisco on Aug. 31. He appeared as a reserve in the Browns season opener and spent the next five weeks on the club’s practice squad.

Seymour spent the first 14 weeks of his rookie season on the Seahawks’ practice squad before being signed to the 49ers’ active roster, where he was inactive for the final three games.

The Browns also signed defensive lineman Christian Tupou to the practice squad.

The 6-2, 289-pound Tupou is in his second NFL season out of Southern California. Originally signed by San Diego as an undrafted free agent in 2013, Tupou appeared in five games with the Chicago Bears during his rookie season. He registered three tackles as a reserve. This season, he spent four weeks on the Arizona Cardinals’ practice squad.

The club also waived defensive Isaiah Trufant, who was placed on injured reserve with a knee injury on Aug. 30.