Early career (2010–2018) Coffey debuted as a wrestler for the independent promotion World Wide Wrestling League in 2010. Before his arrangement with WWE, he wrestled for various other promotions including
Pro Wrestling Elite, Target Wrestling and the Scottish Wrestling Alliance, winning several titles.
Insane Championship Wrestling (2012–2019) Coffey made his
ICW match at the ICW 1st Annual Square Go! battle royal on 21 January 2012. In his early run he would work with
Noam Dar, Andy Wild and his brother in efforts to win the
ICW Tag Team Championship and
ICW Zero-G Championship. Between 2013 and 2018, he would become a three-time
ICW Zero-G Champion by defeating Mikey Whiplash, Fergall Devitt and Aaron Echo, Andy Wild, DCT,
Jordan Devlin and
Rampage Brown in a gauntlet at
ICW: BarraMania 4. He also earned four ICW Tag Team Championship reigns with Polo Promotions partner Jackie Polo through wins over
Brian Kendrick and Paul London, Kid Fite and
Sha Samuels, Davey Boy and
Joe Hendry, and Mike Bird and
Wild Boar. He also got two chances at the
ICW World Heavyweight Championship, firstly against
Trent Seven in 2017 and lastly against
Lionheart in 2019.
WWE (2018–2025) NXT UK (2018–2022) Coffey would regularly appear on the
NXT UK brand, being accompanied by his brother
Joe in a winning effort on the first ever televised match on
NXT UK. They would both go on to form the stable
Gallus alongside
Wolfgang and feud with
British Strong Style. On the 6 February 2019 episode of
NXT UK, Coffey faced
Walter in a losing effort in Walter's second match on
NXT UK. On the 4 October episode of
NXT UK, Mark and Wolfgang defeated previous champions
Mark Andrews and
Flash Morgan Webster for the
NXT UK Tag Team Championship, going on to hold it for 497 days. On the 14 July 2022 episode of
NXT UK, Coffey defeated
Noam Dar to become the new
NXT UK Heritage Cup Champion. He would soon lose it back to Dar on the 25 August episode of
NXT UK.
NXT (2022–2025) On
NXT Heatwave, Gallus made their
NXT 2.0 debut, attacking
Diamond Mine. On August 23, 2022, Gallus made their tag team debut on NXT facing
NXT UK Tag Team Champions Brooks Jensen and
Josh Briggs, which they would win via countout. At
Worlds Collide, Gallus became the second team eliminated from the
Fatal four-way tag team elimination match for the
NXT and
NXT UK Tag Team Championship. Gallus would have a rivalry with Briggs and Jensen, with the latter winning a
No Disqualification tag team match between the teams. Gallus was suspended in September for attacking officials. At
New Year's Evil on January 10, 2023, Gallus returned from their suspension and won a
gauntlet match to become the #1 contenders for the
NXT Tag Team Championship, which Coffey and Wolfgang won on
Vengeance Day the month after. On the 14 March episode of
NXT, Gallus retained their titles against
Pretty Deadly. At
NXT Stand & Deliver, Gallus defeated the
Creed Brothers and The Family to retain the tag titles with help from a returning Joe Coffey. Gallus would defend against the Creeds and
The Dyad in the next months including a triple-threat on the 14 April episode of
NXT and against the Creeds at
NXT Battleground. At
NXT Gold Rush, Gallus defeated Malik Blade and Edris Enofe. At
NXT: The Great American Bash, Gallus lost the NXT Tag Team Championship to
Tony D'Angelo and
Channing "Stacks" Lorenzo, ending their reign at 176 days. In April 2024,
ESPN reported that Gallus help trained
The Rock for his tag team match with
Undisputed WWE Universal Champion Roman Reigns against
Cody Rhodes and
World Heavyweight Champion Seth "Freakin" Rollins at Night 1 of
WrestleMania XL. On the May 14, 2024 episode of NXT, and as the show was going off the air, the cameras went backstage, showing
Wes Lee,
Josh Briggs and
Ivar assaulted backstage. The attackers were then revealed to be Gallus, making their first televised appearance on NXT since the February 13, 2024 episode of NXT. On May 2, 2025, all members of Gallus were released from WWE. == Championships and accomplishments ==