He played college football at Notre Dame and was signed by the Chicago Bears as an undrafted free agent in 2019.
Mustipher was a consensus four-star prospect, and received offers from 26 schools, including Alabama, Clemson, Ohio State, and Notre Dame.
In his senior season in 2017, Mustipher started all 13 games at center, leading a rushing attack that ran for 3,503 yards and scored 35 touchdowns.
After going unselected in the 2019 NFL draft, Mustipher was signed by the Chicago Bears as an undrafted free agent on May 2, 2019.
[5][6] He was waived during final roster cuts on August 31, 2019,[7] and he was subsequently signed to the team's practice squad the next day.
[10] Like in 2019, Mustipher was among the Bears' last roster cuts prior to the 2020 season on September 5, 2020, before joining the practice squad the next day.