Mario Marcell Haggan (born March 3, 1980) is a former American football linebacker who played in the National Football League (NFL) for the Buffalo Bills, the Denver Broncos, and St. Louis Rams. He was selected by the Bills in the seventh round of the 2003 NFL Draft after playing college football at Mississippi State.

Haggan grew up in Clarksdale, Mississippi, where he attended Clarksdale High School, played football and was named an All-American. He was named first-team all-state by the Jackson Clarion-Ledger and played in the Mississippi/Alabama All-Star Game. Haggan led his team to the state Class 4A championship in 1997. As a senior, he recorded 158 tackles with three fumble recoveries and earned Honorable Mention All-American honors from USA Today.

Haggan played at Mississippi State from 1998-2002 playing both linebacker and defensive end. Haggan was a member of the Bulldogs’ 1998 SEC Western Division championship squad as well as the 10-win 1999 team that led the nation in defense. During his time at MSU the Bulldogs played in the SEC Championship Game, the Cotton Bowl, the Peach Bowl, and the Independence Bowl. Haggan was a first-team All-SEC selection by the Associated Press and second-team All-America honoree by The Sporting News in 2000 and a second-team All-SEC selection in both 2001 and 2002. He was the Bulldogs’ leading tackler in each of his last three seasons, including 119 tackles his senior season and ranks eighth in MSU history with 359 total tackles.^[1][2]

He is married to Tanika Haggan who was a volleyball player at Mississippi State and also served as a business education teacher and volleyball coach at Rowlett High School in Rowlett, Texas.^[8]