Allen was selected by the Kansas City Chiefs in the second round, 44th overall.[3][4] In his rookie season, he appeared in all 16 games, and became a starter at left guard by Week 4 against the San Diego Chargers. For his first two seasons with the Chiefs, he played with Jon Asamoah who was a teammate of Allen's at Illinois.
Houston Texans
On March 9, 2016, Allen signed a four-year contract with the Houston Texans.[5][6]
On May 11, 2018, Allen was placed on the reserve/physically unable to perform list after dealing with concussions and ankle injuries.[7] On July 13, 2018, Allen was released by the Texans after reaching an injury settlement.[8]
Kansas City Chiefs (second stint)
On October 16, 2018, Allen signed with the Chiefs.
Allen was re-signed on August 20, 2019.[9] He was released on October 3, 2019. He announced his retirement after the Chiefs won Super Bowl LIV.[10] Despite not being on the roster when the Chiefs won the Super Bowl, he received a Super Bowl ring from the Chiefs.[11]
Personal life
Allen is married to Marrisa Holden, a former Illinois soccer player. They have one daughter and son together.
In 2018, the couple founded The Cookie Society, a gourmet cookie shop based in Frisco, Texas.[12]