Glamorgan Wanderers have suffered a blow before the derby clash against Cardiff at the Arms Park in the Principality Premiership on Saturday.
Top points scorer Scott Sneddon pulled up in training on Tuesday and Mark Roper has stepped in to the outside half berth.
However, Blues centre Dafydd Hewitt is available as is Jason Pocock who came off early last week with an eye injury.
Captain Nick Kelly returns to the second row after appearing in the back row last week but prop Scott Andrews drops down to the bench due to his commitment with the Blues U-20's. Ben Warbuton, brother of Wales U-20's captain, Sam. joins the squad for the first time this season after putting some excellent performances for Merthyr on dual registration.
GB7s women left their England base to train in Wales this week. Olympic Games hopeful Rachael Burford gives WRU TV's Graeme Gillespie her thoughts on Welsh teammate Jasmine Joyce - a 'one touch wonder'
The GB7s women's squad is currently training at Wales' Centre of Excellence where assistant coach Richie Pugh tells WRU TV's Graeme Gillespie some 'tough calls' will have to be made when it comes to finalising the 12 spots for Rio's Olympic Games.
Wales U20's Billy McBryde is looking forward to starting his first game against New Zealand this afternoon in the World Rugby U20 Championship where his side are looking to gain revenge from last week's pool defeat to the Kiwis.