Scarlets picked up an impressive win over Glasgow Warriors to keep the pressure on Leinster, while Benetton, Cheetahs and Munster also won.
Edinburgh were beaten at home by Ulster in the Pro14, while the Ospreys thumped Connacht in Swansea.
Wales are looking at Wayne Pivac as a possible replacement for Warren Gatland in 2019, according to the Scarlets coach.
Paddy Jackson and Stuart Olding were cleared of rape charges at Belfast Crown Court on Wednesday.
Exeter Chiefs have announced the signing of Alex Cuthbert from next season, the Wales winger signing a three-year deal.
Leinster suffered a surprise Pro14 defeat against Ospreys on Saturday, while Cardiff Blues won for a fifth game in a row.
There were wins for Glasgow Warriors, Edinburgh and Cheetahs in Pro14 on Saturday, with Duncan Weir among the star performers.
Iain Henderson has put pen to paper on a new deal with the Irish Rugby Football Union until June 2021.
Following on from Rory Best's contract extension, Rob Kearney has agreed a deal with the IRFU until November 2019.
John Mulvihill has been named as Danny Wilson's replacement by Cardiff Blues.
Set to join Toulon at the end of the season, injury looks to have ended Rhys Webb's time in Welsh rugby.
Edinburgh and Cardiff Blues both claimed wins to boost their respective playoff hopes in the Pro14 on Friday.
Ahead of Wales' final Six Nations match, Alun Wyn Jones has signed a new NDC, meaning he will continue to represent the Ospreys.
Tom Varndell has swapped the Championship for the Pro14 after agreeing to leave Bristol for Scarlets.
Connacht looked set for a valuable win in Bloemfontein but Niel Marais had other ideas, getting Cheetahs their first victory since January.
People were warned against taking to the roads during Storm Emma this week, so Wales' Jonathan Davies helped those in need.