Gregor Gillespie (born November 13, 1987) is an American professional mixed martial artist and graduated collegiate wrestler who competed in the lightweight division of the Ultimate Fighting Championship (UFC).

He continued wrestling for Edinboro University, where he was a four-time NCAA Division I All-American and won a national championship in 2007.

[7][3] He was an assistant coach at Hofstra University and as a side gig, taught private lessons to an MMA fighter.

Despite having vowed never to fight, he started studying MMA and quit his job in order to pursue a full-time career in the sport.

[9] After compiling an undefeated 7–0 record with six finishes on the regional scene in New Jersey, Gillespie signed a contract with the Ultimate Fighting Championship.

[10] Gillespie made his promotional debut against Glaico Franca on September 24, 2016, at UFC Fight Night 95.

[29] Instead, Gillespie faced No-Gi Jiu Jitsu World medalist Carlos Diego Ferreira on May 8, 2021, at UFC on ESPN 24.