Scott Williams returns from injury at Judgement Day as the Scarlets face the Dragons and Cardiff Blues tackle the Ospreys.
Wales and Scarlets winger Harry Robinson has confirmed his retirement from rugby at the age of 23 because of injury.
Scarlets front row trio Peter Edwards, Wyn Jones and Dylan Evans have agreed new contracts with the Welsh region.
Scarlets wing DTH van der Merwe has been ruled out for the rest of the season with a shoulder injury.
Glasgow Warriors put in an impressive performance to score seven tries and beat Scarlets 46-10 in their PRO12 clash.
Scarlets hooker Emyr Phillips has signed a new two-year contract with his home region.
Watch all the highlights of this weekend's Guinness PRO12 action including the derby clash between Leinster and Munster.
Cardiff Blues kept their top six hopes alive with a 28-22 victory at Scarlets in the Guinness PRO12 on Saturday.
Fast and easy online Sky Sports upgrade
Rugby Union news, direct to your mobile
A Day Pass for only £6.99. No contract
Win in our free to enter competitions section
Predict six scores to win the £250k jackpot!
Aviva Premiership Rugby Final 2016
28th May 2016
Sevens and the City
2nd July 2016
Barbarians v South Africa
5th November 2016