He entered the game for the injured Chad Henne in the third quarter and completed 6 of 17 passes for 49 yards and one interception.

[11] Mallett started the next week against Notre Dame and led the Wolverines to a 38–0 victory by throwing 3 touchdown passes, going 7 of 15 (46.7%) for 90 yards.

[22] On January 14, 2008, he enrolled at the University of Arkansas, where he was ineligible to play during the 2008 season due to NCAA transfer policies.

Prior to the 2009 season, Mallett was named by ESPN's Bruce Feldman as one of college football's top 10 newcomers of the year, citing his arm strength as a major determining factor.

[28] Mallett earned the starting job in the Razorbacks' first game against Missouri State, going 17-of-22 for 309 yards and a touchdown.

The victory over Troy pushed Arkansas' record to 6–4 and secured the Hogs' bowl eligibility, with games against Mississippi State and LSU remaining.

[37] Mallett went on to throw for 313 yards and matched his career high of five touchdown passes in a 42–21 victory over Mississippi State.

[39] The Razorbacks finished the 2009 season with an 8–5 record and won the 2010 Liberty Bowl against East Carolina, 20–17 in overtime.

[42][43] Mallett chose to forgo entering the 2010 NFL draft, and returned for his junior season at Arkansas.

[44] On February 17, 2010, the Razorbacks announced that Mallett suffered a left foot injury in a change of direction conditioning drill.

[50] He was listed as the frontrunner for the Davey O'Brien Award by The Sporting News and a potential Heisman Trophy candidate.

[55] Arkansas played Alabama in the next game and suffered their first setback of the season as Mallett had 357 passing yards, one touchdown, and three interceptions.

[61] On January 6, 2011, Mallett decided to forgo his senior year at Arkansas and declare for the 2011 NFL draft.

[81] Following the Patriots' decision to release Hoyer prior to the season, Mallett was promoted to second-string quarterback behind Tom Brady.

[83] In the Patriots' blowout victory against the Houston Texans in December 2012, Mallett came into the game late in the fourth quarter and threw his first interception in the NFL on a pass deflected by intended receiver Visanthe Shiancoe.

[85] On August 31, 2014, the Patriots traded Mallett to the Houston Texans for a conditional sixth-round pick after losing the backup job to rookie Jimmy Garoppolo.

[87] During Week 11 of the 2014 season, Mallett started his first game, against the Cleveland Browns where he threw his first touchdown pass, to J. J. Watt.

Mallett apologized and told head coach Bill O'Brien that he missed practice due to oversleeping.

[93] Head coach Bill O'Brien announced afterward that Mallett would replace Hoyer as the starting quarterback.

[94] In Week 4 against the Atlanta Falcons, Mallett was benched with the Texans trailing 42–0 in favor of Hoyer, who then led the team to 21 points in a 48–21 loss.

[100] On December 27, 2015, Mallett threw for a career-high 274 yards, leading the Ravens to a 20–17 upset victory over the Pittsburgh Steelers in his seventh career start, after Jimmy Clausen was benched.

[105][106] In 2019 Mallett attended the XFL Tampa Bay Summer Showcase, but wasn't drafted to the league.

[112][113] According to the Okaloosa County Sheriff's Office, Mallett was swimming with his girlfriend and was unable to make it to the safety of a sandbar and drowned.

[114] The National Weather Service warned of rip currents around beaches in the Destin area, which were under yellow flag conditions at the time of the tragedy.

[114] The Destin Fire Control District clarified that there were no rip currents present in the area during the response to Mallett.