[1][2] A product of the Ospreys Academy, he signed his first professional contract with his home region in 2016 having also featured for his hometown team, Bridgend Ravens.

After his breakthrough season in 2015/16 he suffered an anterior cruciate knee ligament injury in training in July, 2016, and was forced to spend more than a year on the sidelines.

[3] After presenting great progress for his regional team, Watkin was selected in the 36 man squad for the Autumn internationals in 2017.

He was recognised by Warren Gatland as an upcoming star and was selected for multiple other squads, including the Grand Slam winning Welsh team in 2019.

Owen Watkin was selected in the 46 man training squad to travel to Switzerland in June 2019 ahead of the 2019 Rugby World Cup.