Chicago Bears After going unselected in the
2019 NFL draft, Mustipher was signed by the
Chicago Bears as an undrafted free agent on May 2, 2019. He was waived during final roster cuts on August 31, and subsequently signed to the team's
practice squad the next day. Mustipher was signed to a reserve/future contract with the team at the conclusion of the season on December 30. As 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. He was promoted to the active roster on October 14 after
James Daniels was placed on
injured reserve. Mustipher made his NFL debut on special teams against the
Carolina Panthers in Week 6. He appeared in his first game on offense as a center the following week against the
Los Angeles Rams after
Cody Whitehair left the game with an injury. Mustipher was one of the lowest rated players on the team through the first six weeks of the season by
Pro Football Focus.
Baltimore Ravens Mustipher signed with the
Baltimore Ravens on May 15, 2023. He was released on August 29, and re-signed to the practice squad two days later. He was elevated to the active roster on September 9, and signed to the active roster on September 19.
Denver Broncos On April 4, 2024, Mustipher signed a one-year deal with the
Denver Broncos. On August 27, he was released by the Broncos as part of final roster cuts.
Los Angeles Chargers On August 28, 2024, Mustipher was signed to the
Los Angeles Chargers' practice squad. He was promoted to the active roster on October 30.
Tennessee Titans On April 18, 2025, Mustipher signed with the
Tennessee Titans. On August 25, he was released by the Titans as part of final roster cuts.
Baltimore Ravens (second stint) On September 18, 2025, Mustipher signed with the Baltimore Ravens' practice squad. He was released on September 30.
Los Angeles Chargers (second stint) On October 2, 2025, Mustipher signed with the Los Angeles Chargers' practice squad.
Denver Broncos (second stint) On December 26, 2025, Mustipher was signed by the Denver Broncos off of the Chargers practice squad following an injury to
Luke Wattenberg. He saw playing time in one regular season game and two playoff games, serving as the backup to
Alex Forsyth. ==Personal life==