John David Warner, better known by his professional name Jackie Boy Warner, is a Scottish mixed martial artist. He is the older brother of hardcore wrestler and former mixed martial artist Sarah Warner, better known as Baby Dogg, and appeared in a series of vignettes with her during her short time in xWo. Jack and Sarah have two older brothers, Eddie (deceased) and Stevo. Jackie Boy's signature move is a modified full nelson known as The Gunner's Daughter.