Newly crowned Shimmin Wilson Manx Shield champions Southern Nomads went down to a first defeat of the season on Saturday.
They were beaten 7-12 at home to Douglas B.
Paul Gale and Adam Howarth were both in the points for Douglas.
At Glencrutchery Road, Vagabonds B beat Ramsey B 12-10.
Jason Bowden and Jack Moore both picked up tries for Vagas with Moore also adding a decisive conversion.
Ramsey’s promising 17 year-old Danny Webb notched both Ramsey tries but James Wren missed a conversion attempt with the last kick of the game which would have earned his side a draw.
Castletown beat Emerging Nomads 20-3 in the final game of the afternoon.
Dave Edge got Nomads on the board with a penalty but Town were just too strong for them in the end.
James Jones, Conor Stephens and Nick Kieswetter all bagged tries for Town with Ed Alderson weighing in with a conversion and a penalty.