Lee began playing rugby with the Felinfoel RFC youth side, as well as with Coedcae School.
[7] Lee was part of the Scarlets squad that won the league that season, but suffered a recurrence of a knee injury in the final.
[18] Lee was selected in the squad for the 2014 Wales rugby union tour of South Africa, coming off the bench in the first test.
He made his first start in the second test, as Wales narrowly lost to South Africa, in place of stalwart Adam Jones.
For the 2015 Six Nations Championship, Lee retained the starting berth, but was ruled out of the second match against Scotland, having suffered a concussion in the opening fixture against England.
[24] Lee also played against England in a warm up match ahead of the 2016 Wales rugby union tour of New Zealand.
A knee injury ruled Lee out of the 2017 Wales rugby union tour of Tonga and Samoa.
[27] A back injury prevented Lee from featuring in any of the tests on the 2018 Wales rugby union tour to Argentina and the United States.
[29] Lee recovered in time to participate in the 2019 Six Nations Championship, featuring in the first two tests before succumbing to injury, as Wales went on to win the Grand Slam.