As a senior, he played alongside future college teammate Tyler Huntley and he ran for 1,098 yards on 145 carries with 17 touchdowns.

Moss and the Utes clinched their second Pac-12 south title on November 30, 2019, and played in the Pac-12 championship game against Oregon University on Friday, December 6, 2019.

[16] In his NFL debut in Week 1 of the 2020 season against the New York Jets, Moss scored a four-yard receiving touchdown from quarterback Josh Allen.

[21] Moss was a healthy scratch for the Bills in Week 1 against the Pittsburgh Steelers, as the team opted to play Matt Breida in his stead.

[22] The following week against the Miami Dolphins, Moss made his season debut one day after attending his aunt's funeral.

[25] On November 1, 2022, the Buffalo Bills traded Moss along with a conditional sixth-round pick in the 2023 NFL draft to the Colts for running back Nyheim Hines.

[26] Due to an injury to starter Jonathan Taylor, Moss became the Colts' primary running back starting with the team's game against the Los Angeles Chargers.

In their Week 3 game against the Baltimore Ravens, Moss carried the ball 30 times for 122 yards as well as catching a 17-yard pass for a touchdown.

[36] Moss logged 74 carries for 242 yards and 2 touchdowns over 8 games before he was placed on injured reserve with a neck injury on November 5, 2024.