Wakefield Trinity stylishly claimed just a second victory in 13 Super League matches, beating fellow strugglers Hull KR 38-10.
Victory on the road at Catalans Dragons sees London Broncos join three other teams on 18 points at the foot of Super League.
Three tries in a dominant spell saw Wigan Warriors ease past potential play-off opponents Warrington Wolves.
Super League leaders St Helens put in an impressive second-half display as they stormed to a 36-20 victory over Leeds Rhinos at Headingley.
Leeds Building Society have gifted their shirt sponsorship to Samaritans for the Rhinos' Super League clash with St Helens on Thursday.
Ratu Naulago scored twice as Hull FC eased past Super League strugglers Wakefield Trinity on Sunday.
Castleford Tigers climbed to fifth place in Super League as a four-try display saw off a London Broncos side who led in the early stages.
Leeds Rhinos moved four points clear of 12th-place London Broncos by thrashing Catalans Dragons on Friday, despite having a man sent off.
Warrington Wolves offered little resistance against Super League leaders St Helens, who ran out 30-12 winners in Thursday's clash.
The clinical Ash Handley has agreed a new deal to remain at Headingley until at least 2023.