In a game with ramifications for both teams in Super League, Huddersfield Giants held on to secure an 18-12 triumph over Hull KR.
Wigan Warriors crushed Wakefield Trinity in a one-sided encounter at the DW Stadium, Liam Farrell leading the way with three tries.
Having seen health problems halt a boxing career, Manu Vatuvei has now also called time on his rugby league playing days.
Super League table-toppers St Helens moved 10 points clear after a 32-10 win over Wigan Warriors, while Salford surprised Warrington.
Hull FC surged 34-0 ahead before holding on for a 35-22 victory over Super League's basement dwellers on Thursday.
On a busy day for the Wigan Warriors, it was announced George Williams is leaving to join the Canberra Raiders.
A dominant first-half display from Warrington Wolves saw them blow struggling London Broncos away on the road on Saturday.
Leeds Rhinos, St Helens and Wigan Warriors all enjoyed momentous victories in Super League on Friday.
Castleford Tigers head coach Daryl Powell says he has unfinished business at the Super League club after extending his deal until 2022.
Darnell McIntosh played a starring role as Huddersfield Giants ended a four-game losing streak with victory at Salford Red Devils.