Murton continued the recent uplift in their Division Two form with the result of the day as they toppled leaders Peterlee by five wickets.
Peterlee looked in decent shape as Aaron Shellie (33) and Dan Craig (53) shared a productive second-wicket partnership.
But when they were parted the Murton bowlers got on top to such an extent that the visitors crumbled to 157 all out.
Phumzile Yiba led the home assault with 4-47 in 11.4 overs, but Chris Winn, Sam Sanderson and Thomas Spinks took two wickets each.
That team effort theme extended to the Murton innings where six batsmen contributed to the run chase, Ricardo de Nobrega finishing things off with an unbeaten 30.
Sanderson made 27, Lewis Aiken 26, Winn 25, Aiden Vout (20no) and Jordan Vout (18), with Craig grabbing two wickets in vain.
In another surprise result, Littletown impressively defeated Whiteleas by 31 runs despite only making 124 themselves, skipper Gregg Arundel hitting 34.
On a day for the bowlers, Abdul Ameer (5-24) looked to have put Leas in the driving seat, but Joe Dodd (3-25), Brian Conlon (3-34) and Shashikant Kadam (3-6) proved to be a potent trio as Littletown made a big move into the top two.
Ushaw Moor are the new leaders after a nine-wicket demolition job on struggling Silksworth.
Glen Davison (24) and Gary McAvoy (23) led Silksworth to 138 all out as Jamie Robinson (4-17) and Steven Parnaby (3-27) stole the show.
Stephen Hancock’s unbeaten 87, with 19 fours, hurried Ushaw Moor home in 24.3 overs, supported by Lewis Cook (27) and Parnaby (21no).
Langley Park still sit just above bottom Silksworth after losing to Marsden by seven wickets. Steven Neilson plundered 7-39 as Marsden bowled Langley out for 126, then Chris Mann’s unbeaten 83 secured victory.
Ryhope’s Adrian Hedley enjoyed his afternoon against Boldon CA, smashing 19 fours and two sixes in a 60-ball stay at the crease that produced 104 runs.
Joining him in the run fest was opening partner Connor Pearson (81 from 85 balls, with nine fours and two sixes) as they shared a 150-run stand.
Dan Douglas added 32 and Paul Jenkin an unbeaten 22.
Set a daunting 248-2, Boldon CA put up a great fight before going down by just 27 runs, Mark Cox (52), Lee Woodward (37) and Thomas Jubb (36) providing good knocks.
Sagar Udeshi finished with 4-50, while Hedley bagged 2-31 and Douglas 2-10.
Houghton, after posting 242-8 declared, were pipped by Evenwood, who claimed a four-wicket win with an over to spare.