College Desormeaux started playing for the Cajuns in his redshirt freshman year in 2005, going 2–2 as a starter. Following his first season, Desormeaux was one of three freshmen to be named to the All-Sun Belt team and was named to the teams Champion Award at the postseason banquet for his outstanding performance in both throwing and rushing in his first season. Going into his second season, Desormeaux played 12 games on special teams, while also seeing time at quarterback, wide receiver, and defensive back. He was named the Cajuns Special Teams Player of the Week in the losing effort against eighth-ranked LSU where he recovered two fumbles. He was named the Cajuns Offensive Player of the Week in the losing effort against Texas A&M where he scored the lone touchdown in an eight-yard rush. Following the season, Desormeaux was named the recipient of the Robert E. Trahan Achievement Team Award for an individual who achieves many accomplishments with the help of his teammates. In his junior and senior years, Desormeaux became the starting quarterback after Jerry Babb's departure. Desormeaux would soon become one of the most famous Cajuns players in history, tying and breaking numerous records, including ranking third for 1,000+ rushing yards in history and finishing 20th for most rushing yards by a quarterback in NCAA history. Throughout his time, Desormeaux was named to numerous lists, including 2005 First-team All-Sun Belt Team, 2006 and 2007 Second-team All-Sun Belt Team, 2005–06, 2006–07, and 2007–08 Sun Belt Conference Commissioner's List.
Professional Desormeaux was signed as an undrafted free agent by the
Jacksonville Jaguars on April 26, 2009. After being waived on September 5, Desormeaux was signed to the Jaguars'
practice squad on September 6. He was released on September 21. Desormeaux signed a practice roster agreement with the
Calgary Stampeders on October 8, 2009. ==Coaching career==