Shimmin Wilson Shield holders Vagabonds B lost 55-0 to close rivals Douglas B at Port-e-Chee on Saturday.
The win takes Douglas two points clear at the top of the standings.
Two first half tries from Laurie Williams, plus tries from Luke Hyland and Mark Shortland, and three conversions from Hyland, gave Douglas a 26-0 half-time lead they never looked like relinquishing.
In the second half, a hat-trick from Cal Randle, plus tries from Ben Webb and Jack Moore and another two Hyland conversions, saw Douglas run away with the game.
At QEII, Western Vikings picked up their first win of the season beating Ramsey B 38-25.
Kevin Mellor and Sam Peel were both on target with two tries apiece for Vikings with Paul Wheeldon also picking up a try.
Peel also kicked five conversions and a penalty.
For Ramsey B, new signing Jake Corkish scored two, there was also a debut try for Joe Flanagan and Ben Harding crossed.
Scott Kneale kicked a penalty and a conversion.
In the intra club derby, Southern Nomads were 20-7 winners over Emerging Nomads.
Harry Catlow, Gerard Landels and Jack Sleight all scored tries for the men in green with Rob Martin adding a penalty and a conversion.
Rob Craine scored for Emerging Nomads with Harry Best adding the conversion.
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