Zachary William-Jacob Allen is an American football defensive tackle for the Arizona Cardinals of the National Football League (NFL). He played college football at Boston College.
Allen was selected by the Arizona Cardinals with the 65th overall pick in the third round of the 2019 NFL Draft.
As a freshman in 2015, Allen played in all 12 games of the regular season, primarily as a member of the special teams unit. He participated in 66 plays on special teams and 46 plays at the defensive end. In the first game of his collegiate career, Allen registered an assisted tackle in the season opener vs. Maine and recorded one solo tackle against Howard.
Following training camp, Allen was named a starting defensive end to start the season. Allen started for the Cardinals in his debut during Week 1 of the 2019 NFL season against the Detroit Lions. During the game, Allen recorded three solo tackles. He played in the first four games before suffering a neck injury in Week 4. He missed the next six games before being placed on injured reserve on November 13, 2019.
In Week 1 against the San Francisco 49ers, Allen recorded his first career sack on Jimmy Garoppolo during the 24–20 win. He was placed on injured reserve on October 27, 2020. He was activated on November 28, 2020. In Week 15 against the Philadelphia Eagles, Allen led the team with 11 tackles and sacked Jalen Hurts once during the 33–26 win.
Allen entered the 2021 season as a starting defensive end. He played in 15 games with 14 starts, recording 48 tackles, four sacks, and three fumble recoveries.