After going undrafted in the 2018 NFL draft, Mitchell signed with the Los Angeles Rams. Mitchell signed with the Los Angeles Rams as an undrafted free agent on May 2, 2018.[3] He was waived on September 1, 2018 and was signed to the practice squad the next day.[4][5] He was released on October 23, 2018.[6]
Houston Texans
On October 29, 2018, Mitchell was signed to the Houston Texans' practice squad.[7] He was promoted to the active roster on December 24, 2018.[8] The Texans waived him on August 31, 2019, during final roster cuts.[9] On September 1, 2019, Mitchell was signed to the Texans' practice squad.[10] He was promoted to the active roster on October 23, 2019.[11] He was waived on November 21, but re-signed two days later.[12]
On September 5, 2020, Mitchell was waived by the Texans and signed to the practice squad the next day.[13][14] He was elevated to the active roster on November 25, December 5, December 12, December 19, and December 26 for the team's weeks 12, 13, 14, 15, and 16 games against the Detroit Lions, Indianapolis Colts, Chicago Bears, Colts, and Cincinnati Bengals, and reverted to the practice squad after each game.[15][16][17][18][19] On January 2, 2021, he was signed to the active roster.[20] He was waived after the season on April 12, 2021.[21]
St. Louis Battlehawks
Mitchell was selected by the St. Louis Battlehawks in the 2023 XFL Draft in November 2022.[22] He re-signed with the team on January 23, 2024.[23] He was waived on March 22, 2024.[24] He was re-signed on April 23, 2024.[25]