Newport Gwent Dragons ensured that London Welsh ended their LV= Cup campaign winless with a 14-42 victory at the Kassam Stadium.
The Exiles led 9-6 at half-time, with three penalties from Ryan Davis edging two by Dragons fly-half Steffan Jones.
Dragons upped the tempo after the break with three tries from Hallam Amos, Ieuan Jones and Jevon Groves, although Ed Williamson did cross for Welsh.
Both sides were already out of contention for the semi-finals.
Welsh were able to name Gavin Henson on the bench after a lengthy period out because of a calf injury and the Wales back came on for the final 25 minutes.
London Welsh: Tom Voyce; Joe Ajuwa, Gonzalo Tiesi, Sonny Parker, Phil MacKenzie; Ryan Davis, Alex Davies; Tom Bristow, Neil Briggs, Greg Bateman, Jonathan Mills, Matt Corker, Lee Beach (capt), Daniel Browne, Ryan Newman.
Replacements: Gareth Evans, Franck Montanella, James Tideswell, Adam Brown, Ed Williamson, Tyson Keats, Gavin Henson, James Lewis.
Newport Gwent Dragons: Hallam Amos; Matthew Pewtner, Pat Leach, Jack Dixon, Tom Prydie; Steffan Jones, Wayne Evans (capt); Hugh Gustafson, Dan Way, Ian Nimmo, Adam Jones, Jevon Groves, Darren Waters, Ieuan Jones.
Replacements: Sam Parry, Phil Price, Nathan Williams, Josh Tyler, Nic Cudd, Rhys Downes, Ashley Smith, Dan Evans.