His decision to remain at Wasps means that Young will be ruled out of international selection for Wales.
The pacy open-side flanker began his professional career in the Cardiff Blues academy. During his time there, he also represented Cardiff RFC and Pontypridd. He won international honours for Wales at U16, U18 and U20 levels, representing his country in the 2011 Junior World Championship.
In January 2014 he signed a short-term deal with Gloucester before joining Wasps at the end of the season. Scored a try on debut, in a narrow defeat at Harlequins, in September 2014 and added two more in a home win over Gloucester six months later.
After playing alongside Wallaby legend George Smith in 2015/16, he claimed the number seven shirt as his own the following year, which included a hat-trick of tries in round 22 of the Premiership against Saracens.
His outstanding form earned him a place in the Wales squad for the 2017 Six Nations and he won his first two caps during the summer tour against Tonga and Samoa. His third cap came in the 2019 Six Nations, when a fine performance in Rome appeared to have been crowned by a late try, only for the score to be ruled out by the TMO.
Injuries have restricted him to only twenty-one appearances in the last two seasons, but he was named co-captain, with Dan Robson, for the current campaign.
Has so far made 111 appearances, scoring thirty tries.