Selected by the Cardinals in the third round (65th overall) of the 2019 NFL Draft, Allen played four games (one start) before a neck injury ended his rookie season.
2019: Played the first four games (one start) and was inactive (neck) for the next six contests before being placed on injured reserve in Week 11 ... totaled eight tackles, one tackle for loss and three QB hits ... started and recorded three tackles and two QB hits in his NFL debut vs. Det (9/8); joined fellow draft picks Kyler Murray, KeeSean Johnson and Byron Murphy to mark the first time since the 1970 NFL-AFL merger that the Cardinals had multiple rookies start on both sides of the ball in a season-opener ... tallied two tackles and one tackle for loss, taking down QB Lamar Jackson for a five-yard loss @ Bal (9/15).
Appeared in 50 games in four seasons and totaled 199 tackles, 40.5 tackles for loss, 18.5 sacks, 16 passes defensed, four fumble recoveries, two INTs and two blocked kicks … over his final two seasons, had 161 tackles, 30.5 tackles for loss, 12.5 sacks, 12 passes defensed, two INTs and two fumble recoveries.
2018: Started all 12 games he played and totaled 61 tackles, a career-high 6.5 sacks, 15 tackles for loss, and INT and a career-high eight passes defensed … an All-ACC second-team selection and Pro Football Focus second-team All-American selection … member of the New England Football Writers All-New England Team and earned an All-ACC Academic Football Team selection.
2017: Started 13 games at DE and finished the year as one of two defensive linemen with 100+ tackles nationally … recipient of the 79th annual George 'Bulger' Lowe Award (New England's Heisman Trophy and one of America's oldest college football awards) ... All-ACC honorable mention selection … ranked second nationally among all defensive linemen with 100 tackles … led BC with 6.0 sacks and tied for 10th in BC single-season history with 15.5 tackles for loss … added four passes defensed and his first career INT … named ACC Defensive Lineman of the Week for the first time in his career after career-best 14 tackles and three tackles for loss against #16 Virginia Tech (10/7/17).
2016: Played all 13 games (one start) and had 36 tackles (19 solo) … totaled 10 tackles for loss, 6.0 sacks, four pass breakups, three QB hurries and two fumble recoveries … part of a defense that ranked top-10 nationally in eight categories, including ninth in total defense (314.2 yards/game), second in sacks (3.62 sacks/game), sixth in tackles for loss (8.2 TFL/game) and seventh in rushing defense (108.5 yards/game) ... BC defense twice matched the single-season school record with eight sacks, posted 10+ tackles for loss four times and tied a school record set in 1994 with 47 sacks ... had two sacks in the Quick Lane Bowl victory over Maryland (12/26) ... part of the defensive line that was named the bowl MVP.
2015: Played all 12 games, primarily on special teams … in the first game of his collegiate career, registered a tackle in the season-opener vs. Maine (9/5) … earned the Athletic Director's Award for Academic Achievement.
Named the 2014 Connecticut Gatorade Player of the Year as a senior at New Canaan (CT) High School ... earned the NFF National High School Scholar-Athlete Award for the Northeast Region … a three-year starter for the Rams, winning two state titles in 2013-14 ... named a captain as a senior ... set the school record for career sacks with 33.0, the single-season record with 13.5 in 2014 and tied the single-game record with four on Thanksgiving in 2014 ... named New Haven Register's Player of the Year, CHSCA Player of the Year and MSG Connecticut Varsity Player of the Year … member of the Walter Camp All-Connecticut High School Team and was a finalist for Player of the Year … member of the USA Today All-USA Connecticut team … had 102 tackles, 18 tackles for loss, two INTs, seven forced fumbles, one fumble recovery, 12 passes defensed and scored one defensive TD in his senior season ... also scored three TDs as a TE with seven receptions for 75 yards … also played basketball, earning All-FCIAC honorable mention … a National Football Foundation Scholar-Athlete, member of the National Honor Society and four-year high honor roll student … Finance major in the Carroll School of Management and was the recipient of the Cecilia B. and Richard J. Canning Athletic Scholarship Fund.