Bennett was born in Birmingham, Alabama. He played halfback and several other positions while attending Ensley High School in Birmingham. Bennett was an excellent basketball and baseball player during his high school career. Bennett was an all-state performer for the football team his senior year, amassing over 1,000 yards on 101 rushes. Bennett was nicknamed "Biscuit" by friends because he always had room for one more.
After his college career, Bennett was selected by the Indianapolis Colts with the second pick of the 1987 NFL Draft. The 1987 draft class was deemed the "Year of Linebacker", but Bennett was considered to stand "head-and-shoulders above the rest." Bennett was Alabama's highest draft selection since quarterback Joe Namath went 12th overall in 1965. Bennett and the Colts were unable to come to an agreement on a contract. Bennett was then dealt to the Buffalo Bills from the Colts in a three-way trade that also included Los Angeles Ramsrunning backEric Dickerson and Bills running back Greg Bell. This trade occurred in the fall of the 1987 season, just before the trade deadline, and has been called "the trade of the decade" by The New York Times. In the NFL, Bennett's talent at the left outside linebacker position helped the teams he played for to five Super Bowl appearances, but they lost them all. In his 14 NFL seasons, he recorded 71½ sacks, 7 interceptions, 112 return yards, 31 forced fumbles, 27 fumble recoveries, 78 fumble return yards, and three touchdowns. At the time of his retirement, Bennett's 27 defensive fumble recoveries were the third most in NFL history. Bennett was inducted into the Alabama Sports Hall of Fame in 2004. Bennett is a cousin of former New England Patriotsdefensive end, the late Marquise Hill.
Personal life
On May 1997, Bennett committed "vicious acts" during a sexual assault of a woman at the Hyatt Regency hotel in Buffalo. He pleaded guilty and was sentenced to 60 days in jail for sexual misconduct. He was also placed on three years' probation, fined $500, ordered to perform 100 hours of community service, ordered to pay back $617 in medical bills for the woman, and ordered to undergo anger-management and substance-abuse counseling. Bennett lives in Hollywood, Florida, with his second wife, Kimberly Bennett. In May 2010, Bennett announced he will donate his brain for a study of long-term brain injuries resulting from football-related injuries.