[4] McCollough finished his five-year career from 2019 to 2023 with the Volunteers playing in 60 games where he started in a school record 51 of them, totaling 242 tackles with 15.5 being for a loss, two sacks, 16 pass deflections, six interceptions, a forced fumble, and a touchdown.
[5][6][7][8] After not being selected in the 2024 NFL draft, McCollough signed with the Los Angeles Rams as an undrafted free agent.
[12] McCollough intercepted his first pass, thrown by quarterback Jordan Love on October 6th, 2024, which he returned 4 yards for his first NFL career touchdown during the Rams’ Week 5 loss to the Green Bay Packers.
[14][15] On June 16, 2023, McCollough was officially indicted on a felony aggravated charge where he faced a 3 to 15-year prison sentence.
[18] On February 9, 2024, McCollough pleaded guilty to a misdemeanor assault charge where he was put on probation for a year and ordered to pay $22,000 to the victim.