Gavin Henson was given a shock recall by the Ospreys in their 15-9 Heineken Cup victory over Perpignan at the Liberty Stadium.
Despite being handed a two-match ban for missing training, the British Lions and Wales centre was included in the 22 to cover for an injury crisis behind the scrum.
That came after James Hook (back spasm) joined growing injury list of backline personnel - Rhodri Wells, Nikki Walker, Sonny Parker, Gareth Owen, Mike Phillips and Jamie Nutbrown.
A statement from the Ospreys said they: "have been forced to invite Gavin Henson to take the remaining place amongst the replacements for today's game, bringing short his two-game ban in recognition of the extraordinary circumstances and the good spirit in which Gavin has addressed the recent disciplinary action and his match readiness as a result of his full participation in this week's training with the squad."
Teenage outside-half Dan Biggar kicked all the hosts' points to deliver the lacklustre Ospreys their first win in Pool Three in a scrappy match.
Despite Perpignan having three players sin-binned the Ospreys spurned a host of try opportunities to make heavy weather of opening their account in the competition.
They have now failed to score a try in 160 minutes of European rugby after going down 12-6 at Leicester.
Wales' acting head coach Rob Howley has given Sam Davies and Rory Thornton a boost ahead of the RBS 6 Nations by naming the uncapped Ospreys duo in his largely experienced squad for the Autumn Internationals.