As a freshman in 1999, Smith along with teammate Rudi Johnson, contributed to the school winning the national championship by defeating Dixie College.

As a junior in 2001, he transferred to the University of South Carolina, where he was a backup defensive end, making 11 tackles.

Smith was signed as an undrafted free agent by the Dallas Cowboys after the 2003 NFL draft on May 1.

In 2007, the Bengals opted not to match the restricted free-agent offer sheet that Smith received from the Cleveland Browns.

[7] Smith signed a four-year deal with the Cleveland Browns as a restricted free agent on March 16, 2007.

Quinn denied the reports, and coach Romeo Crennel refused to comment; Browns tight end Darnell Dinkins confirmed the fight during a radio interview on WQAL.

[13] On November 19, 2009, he signed with the Las Vegas Locomotives of the United Football League, to replace an injured Wendell Bryant.

[17] In consecutive weeks, he was accused by players from the opposing team of grabbing them in their private parts during play.

[19] On July 29 of 2011, he signed with the Tennessee Titans a three-year, $7.25 million contract, to play as a defensive tackle.

[20] On November 5, 2012, he re-signed with the Chiefs, to serve as insurance in case Glenn Dorsey missed multiple games with a calf injury.