Lionheart (UK wrestler)

On 11 February 2007 Lionheart made his Insane Championship Wrestling debut, losing to James Wallace.[6] On 3 April 2016, Lionheart captured the Insane Championship Wrestling Zero-G Championship from Davey Boy in a 6-way match at ICW Barramania II. He then proceeded to lose the title in a 6 Man Stairway to Heaven Match to Kenny Williams on 20 November at Fear & Loathing IX.[7] On 2 December 2018 he won the ICW World Heavyweight Championship for the first time in his career, defeating former champion Jackie Polo in a Career vs. Title Match at Fear and Loathing XI.

On 23 September 2011, Lionheart made his Preston City Wrestling debut on their "Road to Glory" show, defeating Jack Gallagher.[8] In March 2014, at a Preston City Wrestling show, McCallum's neck was broken in two places after receiving the Styles Clash following match against AJ Styles.[9] As a result of the injury doctors warned McCallum that he may never walk again.[9] Just over a year later, McCallum defied doctors' orders and returned to in-ring competition in March 2015.[4]

In 2008, McCallum competed for the ROH World Championship against then-champion Nigel McGuinness at a One Pro Wrestling show in a triple threat match also involving Keith Myatt.[10] In January 2011, McCallum competed for Total Nonstop Action Wrestling (TNA), losing to Jeff Jarrett at a houseshow in Glasgow, Scotland.[11] Later that year he also competed for WWE, losing to Justin Gabriel in a dark match on SmackDown in Liverpool, England.[12]