Cross first played rugby as a child for the Youth section of Brynmawr RFC. He then joined Ebbw Vale before switching to the Cardiff Met team.[2] An all-round sportsman, Cross also played football at county level for Gwent and was capped for Wales in rugby league at the under-18 level.[3]
Cross was selected for both the Welsh Students team and the GB Students, the latter at under 15 and under 18, and was part of the team that won the World Students Championships in Brive.[2] He also played in the 2013 Students Olympics.[2] Despite growing up playing the 15-a-side variant of rugby union, it was in rugby sevens that he made his mark. He has made over a hundred appearances as part of the Wales Sevens mainly in the World Rugby Sevens Series.
In 2016 Cross was selected to represent Great Britain at the Summer Olympics in Rio as part of the nation's rugby sevens team.[4]
Cross was selected for Wales national team in 2017 debut from the bench against Australia. He was later selected for his first international start a few months later against Georgia and was selected for the 2018 Six Nations Championship.
Cross represented the Ospreys 71 times between 2017-2023. He played for the Barbarians in a special match against Swansea as part of their 150th anniversary of the club.[5] After six seasons for Ospreys, it was announced that Cross would join English side Newcastle Falcons in the Premiership Rugby competition for the 2023-24 season.[6]
On 18 May 2024, Cross travels to France to sign for Tarbes in the third division Nationale for the 2024-25 season.[7]
