Ospreys centre Keiran Williams scored two tries to help earn his side a 31-9 victory and condemn Scarlets to another derby defeat in Swansea.
Second row Kiran McDonald has become the latest ex-Wasps player to find work after he was made redundant by the club on October 17.
Wasps have signed Scottish lock Kiran McDonald from Glasgow Warriors for next season.
Reeling from more financial strain, and still seeking a new head coach, Wales' summer tour of Japan may offer shafts of light.
The Queensland Reds will welcome back a smattering of Test talent for their top-of-the-table clash with the Chiefs, but won't rush Liam Wright back from his latest shoulder issue.
England lock Ollie Chessum will return to Leicester Tigers' starting XV on Sunday as his side host Saracens in the Gallagher Premiership.
England captain Maro Itoje will return to captain a Saracens side containing four of his international team-mates during the Guinness Six Nations when they host Harlequins in the Gallagher Premiership on Saturday.
England flanker Ben Curry will captain his Sale Sharks side against Newcastle Falcons on Friday in the Gallagher Premiership, six days after his player of the match performance against Wales in the Guinness Six Nations.
Les Kiss is believed to be the front-runner to succeed current Wallabies boss Joe Schmidt.
