Mullen is from Stonington, Connecticut, majoring in the 3+1 journalism program. He will graduate with his bachelor’s degree in journalism in 2026 and his master’s in sports journalism in 2027. Mullen has beat reported for the women’s soccer team and is now part of the men’s basketball beat reporting staff. He has previously commentated on and photographed Quinnipiac athletics for The Quinnipiac Bobcats Sports Network and is the vice president of the Quinnipiac Photography Club.