After succumbing to a thrashing against Edinburgh in their previous match, Scarlets narrowly beat Cheetahs in Pro14.
Undefeated Leinster made light work of the Dragons as Glasgow Warriors thrashed Southern Kings 50-0 on Friday.
The standout team in Pro14 could only manage a 3-0 win against winless Zebre as Leinster struggled on Saturday.
Munster top Pro14 Conference B after their 28-12 victory over Ospreys, while Cardiff Blues were defeated 23-14 by Ulster.
Scarlets made it three from three in Pro14 on Sunday as Glasgow Warriors earned a first win of the season.
Friday's Pro14 fixtures saw a trio of easy victories as the Cheetahs, Leinster and Connacht all won by big margins.
Ulster suffered a hammering in Bloemfontein, where wing Anthony Volmink scored three of nine tries for the Cheetahs.
Leinster's 21-year-old hooker Ronan Kelleher ran in a hat-trick in their thrashing of the Ospreys, while the Scarlets saw held off Glasgow.
Dave Kearney's hat-trick helped Leinster begin the defence of their Pro14 title with a win over Benetton Treviso.
Ruan Pienaar inspired the Cheetahs to victory over the Glasgow Warriors on Friday, while Ulster were too good for the Ospreys.
There has been much confusion surrounding the Southern Kings' search for a new coach and the process has now been aborted.
Alun Wyn Jones will remain on course to break the all-time record for international caps after extending his Welsh Rugby Union contract.
Scotland's record appearance holder Ross Ford has confirmed his retirement ahead of plans to go into strength and conditioning coaching.
Stephen Larkham has agreed to a new challenge with Irish province Munster, signing a deal until June 2022.
Ireland's most decorated player, Rob Kearney, is sure of playing his 15th professional season in his home country.
Leinster failed to read the script as Stuart Hogg's final Glasgow Warriors match ended in a painful Pro14 final defeat.