The Browns placed linebacker Titus Brown and tight end Alex Smith on injured reserve Tuesday, ending their seasons. In addition, the team signed free agent tight end Dan Gronkowski and promoted linebacker Brian Smith to the active roster from the team's practice squad.
The team also signed wide receiver Torrey Grissett and linebacker Craig Robertson to the practice squad.
Originally drafted by Detroit in the seventh round (255th overall) of the 2009 NFL Draft, Gronkowski has appeared in 19 career games with five starts and has recorded nine receptions for 69 yards. He spent the first 12 weeks of his rookie season on the Lions' practice squad before appearing in two contests. He was traded to the Denver Broncos along with a draft pick for defensive back Alphonso Smith on September 4, 2010. Gronkowski appeared in 12 games with the Broncos last season and recorded eight receptions for 65 yards. He was waived on September 7, 2011 and was later signed by New England. In two stints with the Patriots this season, Gronkowski appeared in five games with one start. He was waived by New England on November 8. He is the brother of New England Patriots' tight end Rob Gronkowski and Indianapolis Colts' fullback Chris Gronkowski.
Brian Smith was originally signed by the Browns as an undrafted free agent on July 30, 2011. He appeared in all four preseason games and recorded four tackles, one sack and one forced fumble. He was waived on September 3. He has spent the past three weeks on the Browns' practice squad after re-joining the team on November 29.
Grissett attended Campbell University where he redshirted in 2007. In 2009, he spent time with the Tampa Bay Storm of the Arena Football League (AFL) and spent 2010 with the Amarillo Venom of the Indoor Football League (IFL).
Robertson was a four-year letterman at the University of North Texas (2006-10), where he appeared in 48 games. He totaled 382 career tackles, 3.5 sacks and had nine interceptions.
Brown appeared in 10 games this season as a reserve. He recorded three tackles and a sack on defense and added three stops on stops on special teams.