The former Celtic League champions scored four tries in a 25-minute spell during the second period as they made it two wins from two so far this season.
The bonus-point win means the Ospreys now have nine points from a possible 10, while the Blues currently sit in sixth position with two points after drawing their opening fixture with reigning champions Leinster at the Arms Park last Saturday.Â
James Hook contributed 22 points for the home side as he weighed in with two tries, three conversions and two penalties, with Shane Williams and new signing Tommy Bowe the other Ospreys try scorers.
Ben Blair registered all 10 points for Dai Young’s Blues, who trailed by just two points at 5-3 at the half-time break.
Ospreys
Byrne, Bowe, Parker, A. Bishop, Williams, Hook, Wells; R. Jones, Tandy, Tiatia, Evans, Wyn-Jones, A. Jones, Bennett, D. Jones
Replacements
Walker for A. Bishop (58), Nutbrown for Wells (67), Smith for Tiatia (73), Gough for Wyn-Jones (73), James for A. Jones (73), Shervington for Bennett (77) Not Used Owen
Cardiff Blues
Blair, Mustoe, J. Robinson, J. Roberts, Brew, Sweeney, Allinson; A. Powell, Sowden-Taylor, White, Morgan, Davies, G. Powell, T. Thomas, Filise
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Replacements
Shanklin for J. Roberts (41), Molitika for White (73), Tito for Davies (67), Jenkins for Filise (46) Not Used G. Williams, Spice, N. Robinson