Oriel took full advantage of the clash between the top two sides, Ebberston 2nds and Heslerton 2nds, being curtailed by the wet weather, to climb into second spot after their 189-run hammering of visitors Brompton 2nds.
Adam Robertshaw’s unbeaten 102 helped the hosts to 246-6 in this rain-affected game, support coming from Josh McNeil, 33, and Chris Bryan, 30.
Paceman Jamie Haxby then took 3-17 as Brompton slumped to 57 all out.
Oriel’s win took them to 157 points, and just two behind leaders Ebberston 2nds, who were 55-2 when rain called off their game at home to Heslerton 2nds, who are now third on 156 points.
Ravenscar are still in with a shout in fourth spot on 147 points after their 174-run success at home to relegation-threatened Fylingdales 2nds.
Joe Bayes was the star man for the hosts, smacking an outstanding unbeaten 118 in their 213-4, Ivan Kirk chipping in with 34.
In reply, Fylingdales were dismissed for just 39 runs.
Jish Rewcroft was the top Ravenscar bowler with 6-24, Dinesh Swamiwathan taking the other four wickets for 14 runs.
A magnificent seven-wicket haul by Dan Baldry paved the way for Muston’s eight-wicket win at home to basement club Sherburn 2nds.
Medium-pace bowler Baldry recorded final figures of 7-28 as Sherburn slipped to 62 all out.
After losing a couple of early wickets, Muston stalwarts Stephen Pratt, 29no, and Phil Marr, 26no, eased the hosts to victory.
Sherburn now looked certain to be relegated as they are 36 points adrift of safety.
Also in danger of dropping back down into division B are Whitby 3rds after their 94-run defeat at home to Forge Valley 3rds.
Tim Farrant’s 41 was the highlight of the visitors’ 194-6, which proved to be beyond the grasp of the Whitby team.
Slow bowler Eric Hall and medium-pace Liam Glaves, with 4-14, and 3-12 respectively then skittled the hosts for just 100 runs.
This defeat leaves Whitby third from bottom in the league table, just two points ahead of rivals Fylingdales 2nds, who were also promoted from division B last season.