Warren, 6-4, 325 pounds, originally joined the Patriots as a free agent on April 24, 2010. He was re-signed on August 8, 2011 and then released on September 7, 2011. Warren entered the NFL as a first round draft choice (3rd overall) of the Cleveland Browns in the 2001 NFL Draft out of Florida. Warren has played for the Browns (2001-04), Denver Broncos (2005-06) and the Oakland Raiders (2007-09) in addition to the Patriots. During his 10 NFL seasons, he has played in 151 games with 137 starts and has registered 303 total tackles, 35.5 sacks, 18 passes defensed, seven forced fumbles and four fumble recoveries.
Last season with the Patriots, Warren played in 16 games with 10 starts and finished with 36 total tackles and 3.5 sacks.