In 2017, during Allen's senior year with the Warriors, he was named to the All-Mountain West first team. He also earned All-Conference recognition for the third straight year and was named his team's Coach June Jones Offensive MVP for the second straight year. During this season, Allen started 11 of 12 games at left tackle, scored the highest offensive grade (92.8 percent) on the line, did not allow a single sack in drop-back pass situations, and helped UH achieve its best rushing average (168.2) in 22 years.
Allen missed his only game of the season when the Warriors played Colorado State on September 30, ending a streak of 42 straight starts dating back to his redshirt freshman season. Allen finished with 49 starts in 50 games played during his four-year career.
Based around his performance in the previous season, Allen was named to the All-Mountain West second team as well as was named the Coach June Jones Offensive MVP. Allen started all 14 games in 2015 at left tackle after making an off-season switch from guard. He graded out 90 percent or above in all 14 games. Allen did not give up a single sack all season during drop-back pass plays.
Allen signed with the Chicago Bears as an undrafted free agent on May 1, 2018. He spent the season with the Chicago Bears before being released on May 3, 2019.
Green Bay Packers
Allen signed with the Green Bay Packers on August 29, 2019.[2] He was released during roster cuts on September 1, 2019.[3]