Jason joined Exeter City’s youth setup in 2003, aged eight. He then progressed through the Academy team, and was awarded a professional deal in April 2014.
Pope made his first-team debut on 7 October, replacing Scot Bennett in a 1–3 Football League Trophy away loss against Coventry City.
During the 2015/16 season, Jason, along with Alex Byrne, joined the Seagulls on a six-month youth loan. He then signed a permanent contract with the Club for the 2016-17 season.