He entered the Abbey Insurance Ulster Academy upon leaving school in 2014 and played his club rugby with Queen's University.
The winger represented Ireland at two U20 World Championships, making a significant impact at both tournaments, including the run to the 2016 Final.
Stockdale, now back on the books at Ballynahinch RFC, made his Ulster debut in January 2016 in a 13-32 away success over Benetton Treviso.
The 21-year-old has scored 17 tries in his 37 Ulster appearances thus far and has 8 in 13 games this season.
His excellent provincial form was rewarded with a call up to the Ireland squad for last year's summer tour, during which he made a try-scoring debut against the USA, before also featuring in one of the games versus Japan.
Following the November Internationals and the opening two weekends of the Six Nations, Stockdale now has six tries in as many games for Ireland, including a brace of scores in the recent win over Italy.