Ospreys trio Huw Bennett, Andy Lloyd and Luke Tait will all miss the start of the Celtic League campaign against Munster this weekend.
Wales hooker Bennett, who toured Argentina and South Africa in the summer, is suffering a hernia and could also miss the west Wales derby against Llanelli a week later.
Flanker Lloyd is also out for a fortnight with a hamstring problem while coach Lyn Jones is also keeping a close eye on lock Tait's neck strain.
'It's a blow but we have brought in a number of high-quality players to strength in depth to the the squad,' said Jones.
Meanwhile the Ospreys are considering a change in team name and playing colours for next season as they quiz supporters from Neath and Swansea over the future of the regional team.
Ospreys chief executive Andrew Donald said: 'The consultation will be exactly that - a listening exercise. We want to know from supporters what they think we've got right and where we could do better. We'll want to know what they think of the Ospreys' identity and branding, as well as obtain feedback on the Ospreys' future facilities.'
Dodgy tattoos, carthorses, Avatar and soft chins are revealed by Wales Sevens players Tom Williams and Sam Cross as they profile the Wales Sevens squad taking part in Hong Kong this weekend in the latest round of the HSBC Sevens World Series.
The youngest member of the Wales Women's squad, Keira Bevan, is hoping to repay the faith shown in her when she starts her first Six Nations game against Italy tomorrow evening in the final round of the championship.
Sevens head coach Gareth Williams is a happy man after drafting in full internationals Rhodri Williams and Adam Warren for the next two rounds of the world series in Hong Kong and Japan, as WRU TV's Graeme Gillespie discovers.