Luke Spenceley's stunning 8-8 steers Mulgrave 2nds to win against Nawton Grange
Grange were skittled for just 52 in just 13.2 overs by their promotion rivals.
Earlier, opener Chris Spenceley fell just one run short of a half-century, while skipper Simon Kipling added 30 but the hosts were all out for 170 as Archie Welford bagged 4-27 and Louie Cook 3-19.
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Hide AdPromotion-chasers Snainton stayed cool to earn a four-run home win against Scalby 2nds.
Ben Norman and Mike Kipling snapped up three wickets apiece as Scalby were all out for 123 after Snainton had posted 127-8.
Opener Lee Kerr hit 68 as Scalby looked to be cruising to victory at 102-3, but they then lost their final seven wickets for just 21 runs thanks to top bowling from Norman and Kipling.
Matthew Davies earlier top-scored with a vital 39no, after opener Tom Poor hit 30.
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Hide AdGanton maintained their 100% record with a 34-run home success against Cayton 2nds, Will Bradley hitting a century for the hosts and Lee Pettitt an excellent 124no for Cayton.
All-rounder Bradley smashed the ball to all parts with seven sixes and seven fours in his 102 in 71 deliveries, Patrick Philpott adding 57no, Jack Heslehurst 27 and fellow opener Freddie Bradley 31 as they posted 253-4, Reggie Steels scooping three wickets.
Despite Pettitt hammering 15 fours and four sixes in his 124 not out from 109 balls, and Simon Glave adding 69 the visitors replied with 229-3.
Archie Graham was the main man as Seamer & Irton 2nds cruised to a six-wicket win at home to lowly Glaisdale.
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Hide AdAll-rounder Graham bagged 4-25 as the visitors were dismissed for 140, opener Jack Allanson hitting 42 and Dan Marsay 27.
Graham then led the 2nds to victory with a strong knock of 51, fellow opener Harley Adams adding 42, despite the best efforts of Matthew Tindall (3-29).
Wykeham 2nds' relegation worries increased with a 12-run loss at Settrington.
The home side must have felt they were heading to a defeat that would drag them back into the relegation scrap after being dismissed for 102, Scott Wardman taking five wickets for the visitors.
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Hide AdSettrington fought back though, dismissing Wykeham 2nds for 90 to secure victory.
Joe Lenton's brilliant spell of 5-9 helped Scarborough Rugby Club edge to a four-wicket Division Three win at home to Great Habton 2nds.
Nine-man Habton were all out for 100, openers Josh Campbell-Carter (38) and Charlie Coulson (28no) top-scoring.as the visitors slipped from 82-1.
Basement club Folkton & Flixton 3rds eased to a 44-run success at Wold Newton.