Calhoun was a member of the Mississippi State Bulldogs for five seasons, redshirting his true freshman season. He played mostly as a reserve at guard as a redshirt freshman before becoming a starter the following season, starting nine games before suffering a season-ending injury.[1] He was named second-team All-Southeastern Conference as a redshirt senior.[2] Following his final season Calhoun was invited to participate in the 2019 NFLPA Collegiate Bowl.[3]
Calhoun signed with the Miami Dolphins as an undrafted free agent on April 27, 2019.[4] He made his NFL debut on September 15, 2019, against the New England Patriots.[5] Calhoun made his first career start on October 20, 2019, against the Buffalo Bills in a 31–21 loss.[6] In his rookie season, Calhoun played in 10 games with seven starts, committing one penalty and allowing 1.5 sacks in 470 offensive snaps played.[7]
On September 5, 2020, Calhoun was waived by the Dolphins.[8]
On September 6, 2020, Calhoun was claimed off waivers by the Cincinnati Bengals.[9] On September 28, 2020, Calhoun was waived by the Bengals and re-signed to the practice squad the next day.[10][11] He was elevated to the active roster on October 31 for the team's week 8 game against the Tennessee Titans, and reverted to the practice squad after the game.[12]
On January 6, 2021, Calhoun signed a reserve/future contract with the Arizona Cardinals.[13] He was waived on August 30, 2021.[14] He re-signed with their practice squad on September 29, 2021.[15] He was released on October 4.
Calhoun signed with the Washington Football Team's practice squad on November 24, 2021. He signed a reserve/future contract after the 2021 regular season ended.[17] Calhoun was released on August 16, 2022.[18]
