Jack Claffey (January 7, 1990) is an English professional wrestler and mixed martial artist. He is currently signed to WWE, where he performs on the Raw brand under the ring name Gentleman Jack Gallagher. He is perhaps best known for his appearances at Futureshock Wrestling and Grand Pro Wrestling, where he has won the FSW Championship and GPW British Championship. He is also an accomplished tag team competitor, winning the Futureshock Tag Team Championship with Alex Cyanide as Lethal Dose.