New Zealand's Tony Puletua ran in four tries as St Helens extended their lead at the top of the Super League with a crushing 68-22 win over Castleford.
And the Kiwis fullback Brent Webb scored twice for reigning champions Leeds Rhinos, as they thumped high-flying Huddersfield 34-6.
Wigan ran in nine tries to see off the bottom club Celtic Crusaders 44-10.
Hull KR continued their solid start to the season with a 32-12 comeback win at Harlequins while Steven Bell was one of eight Catalans Dragons try scorers as they cruised to a 38-6 victory over Salford City Reds.
And another former Manly star Chris Hicks scored a hat-trick as Warrington thrashed Bradford 58-22 and Wakefield came from behind to beat Hull 21-14.