McAllister is currently a color commentator for the Saints on radio flagship WWL (AM), having taken over from Hokie Gajan in June 2016,[1] as well as for college football games on SEC Network.

[8] All of these accomplishments were an encore to 2002, when in his first year as a starter he led the conference with 1,388 rushing yards, scored 16 touchdowns and was voted to the Pro Bowl.

[10][11] McAllister was placed on injured reserve on October 10, 2005, after suffering a torn anterior cruciate ligament in his right knee, and returned to the roster for the 2006 season.

McAllister set the all-time rushing touchdown record for the New Orleans Saints with a score against the Green Bay Packers on November 24, 2008.

[16] After sitting out the entire 2009 regular season, McAllister was re-signed by the Saints on January 15, 2010—just one day before their divisional round playoff game against the Arizona Cardinals, to serve as the honorary captain.

[20] McAllister was one of the players that tested positive for an ingredient found in the weight loss product Star Caps, though he retired well before the matter was officially resolved in April 2011.

[26] McAllister filed a civil suit against Razzoo Bar and Patio, a Bourbon Street nightclub, after a Mardi Gras 2004 incident in which he claimed he was assaulted by the club's bouncers.

[29] On July 19, 2018, New Orleans' Fox affiliates WVUE-TV announced that McAllister would join the station as a Saints analyst in addition to his WWL Radio duties, replacing the retired Jim Henderson.

[30] He also owns and operates the Ole Saint restaurant and sports bar chain with locations at 132 Royal Street in the French Quarter of New Orleans and in Boomtown Casino on the Gulf Coast in Biloxi, Mississippi.