Neath could be without the services of two back-row forwards when the season begins next month.
Wales international flanker Brett Sinkinson could miss up to six weeks if he cannot recover from the knee surgery he underwent last month.
Nathan Bonner-Evans is another fighting against time to recover from a pelvic injury.
There is better news however of new signing Andy Newman, who collapsed during a training run on Aberavon beach.
Newman, a Wales A cap signed from Northampton, was taken by ambulance to Morriston Hospital but was released after treatment for dehydration.
Wales Under 20 travel to Newcastle on Friday to face England at Kingston Park. With the likes of Jack Dixon and Ashley Evans returning to the squad, it's arguably the strongest side head coach Byron Hayward has put out in the tournament so far. WRU TV previews the game with Defence Coach Richard Hodges and captain Steffan Hughes.
Wales head coach Warren Gatland gives an exclusive interview to WRU TV after naming his side to face England in the RBS 6 Nations at Twickenham on Sunday. Gatland has recalled British & Irish Lions duo Jonathan Davies and Alun Wyn Jones to his side while Rhys Webb retains his place at scrum half.
Scrum half Rhys Webb and lock Jake Ball both made their first Wales starts in last Friday's win over France at the Millennium Stadium. They talk exclusively to WRU TV's Luke Broadley about their experiences of the day.
Wales Women's Head Coach Rhys Edwards has made three changes to his side to face France at Aberavon on Sunday, where he expects his side to be given a tough time against one of the best teams in the world.