The Browns placed safety Usama Young on injured reserve with a thumb injury that likely will require surgery. In addition, the club signed defensive back Jordan Mabin to the practice squad and free agent quarterback Josh Johnson to active roster.
Young played in 13 games with 11 starts this year. He recorded 52 tackles, 1.5 sacks, three interceptions, seven passes defensed and a fumble recovery.
Originally signed by Baltimore as an undrafted free agent on May 15, 2012, Mabin spent two weeks on the Ravens' practice squad this season. He appeared in 51 career games at Northwestern (2008-11) where he recorded 252 tackles, seven interceptions three fumble recoveries and two forced fumbles. The 5-11, 185-pound Mabin is a native of Northfield Center, Ohio, where he attended Nordonia High School.
Johnson was a fifth-round draft choice of Tampa Bay in 2008. He was with the team for four seasons before signing with San Francisco this past offseason. He was released by the 49ers on August 31, 2012. In four years with the Bucs he played in 26 games with five starts. He completed 96 of 177 passes for 1,042 yards with five touchdowns and 10 interceptions. Four of Johnson's five starts came during the 2009 season. He also has rushed for 254 yards on 37 attempts in his NFL career. The 6-3, 205-pound Johnson played at the University of San Diego (2004-07) where he set school career records for passing yards (9,699), touchdown passes (113), completions (724) and attempts (1,065). He also rushed for 1,864 yards and 19 touchdowns during his collegiate career.