Zak began wrestling at the age of 10 years old for his father's promotion World Association of Wrestling.His first championship match was against Phil Lea for the WAW Youth Championship which Zak lost. While wrestling for WAW, Zak would take on members of his family multiple times including his mother Sweet Saraya, father Ricky Knight, sister Paige and his brother Zebra Kid.
Zak would make his first wrestling appearance outside of the United Kingdom when he traveled to Norway and debuted for the Norwegian Wrestling Federation teaming up with his father to defeat Fremtiden.
Zak participated in the Max21 Cup and got to the final where he was eliminated by Gabriel Antonick.
In late 2010, Zak would begin to regularly team up with his brother Roy, In time they began calling themselves the UK Hooligans.
The pair would go on quite the winning streak.
With their success in the United Kingdom, the Hooligans travelled over to Germany to take on Christian Eckstein & Leon van Gasteren at European Wrestling Promotion for the EWP Tag Team Championship.
On November 11, 2011 episode of Smack Down Zak and two other wrestlers Andy Baker and Tom LaRuffa appeared in a 3 on 1 handicap match against the Big Show during his feud with Mark Henry and were defeated.
Zak is part of a professional wrestling family. The family runs the World Association of Wrestling (WAW) promotion. In July 2012, Channel 4 produced a documentary about the Knights entitled The Wrestlers: Fighting with My Family. The documentary was adapted into a feature film by Stephen Merchant and executive producer Dwayne Johnson, titled Fighting with My Family, with Jack Lowden playing Zak. The film premiered at the Sundance Film Festival in 2019.