Having graduated through Glamorgan and Wales Minor Counties age-group cricket, William Thomas Owen made his First-Class debut for the club against Gloucestershire in Sepetmber 2007. A lanky medium-pace bowler, Owen took a couple of years to establish his spot in the senior team and once he got his chance, he maintained an impressive average with the ball and had also made a career-best 69 against Derbyshire, in 2011, sharing the club's highest tenth-wicket record - with James Harris - while at it.

His success in the longer form enabled opportunities in the limited-overs set up and everything seemed to be heading the right direction until a career-ending injury blocked his path in 2012. He missed most part of the next couple of seasons owing to injury and despite a surgery and a long period of rehabilitation treatment and training, Owen failed to attain the fitness level to play regular First-Class cricket and subsequently announced his retirement from all forms on 17 August 2015, aged 26.

"I am thankful for the support I have received from the club, particularly the medical and conditioning staff. As I look back I’m proud to have lived my dream to play cricket for Glamorgan. I would also like to express my gratitude to all coaches who I have worked with and who have helped me become the player I was and to the PCA. I also have to thank all the supporters for sticking through the tough as well as the good times with me and to the players I have played with who have made the journey so memorable,” Owen said in his retirement statement.