In 2013, this rugby Lock began playing for the Glasgow Warriors. By mid-2014, he had scored ten points and had received twenty-one caps.
During his youth career with Scotland's Under-20 National Rugby Team, he played in 2012's Six Nations Championship.
His 6'6" frame contributed to his athletic prowess.
His older brother, Richie Gray, was a star player on the British and Irish Lions rugby team. The brothers were raised in Rutherglen, Scotland.
He and Duncan Weir both played for the Glasgow Warriors.