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.
Glyncoch have had a remarkable past couple of seasons, having lost just once in the last two seasons. Their fine form has been capped by claiming the South Central Division 5 crown of the SWALEC League.
With two rounds of the HSBC Sevens World Series remaining, Wales head coach Paul John has sprung a few surprises for this week's penultimate round in Glasgow. And there's still plenty to play for with World Cup spots on the line.