Blunt ended unbeaten on 100, backed by Adam Ridley’s 36 as Burnmoor reached 161-2. In reply, neighbours Philadelphia battled to 106-6, with Greg Halliday hitting 38.
Sunderland succumbed by 65 runs to Sacristan.
Sacriston posted 140-5, inspired by Nathan Hall (61) and Charlie Winn (34no), with Jamie Hair taking two wickets.
Jack Johnson’s unbeaten 26 down the order could not rescue Sunderland, who ended on 79-9, with Daniel Stephenson (3-9) and Harry Iveson (2-6) the top bowlers.
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Washington defeated Hetton Lyons by 20 runs.
Adam Khan’s 85 not out led Washington to 148-2, before Raj Singh’s 3-15 restricted Lyons to 128-4, despite Callan Salkeld’s 38.
Eppleton conceded their game at Chester-le-Street.
Seaham Harbour’s 114-8 was not enough for victory in the South East Division as Peterlee secured a narrow two-wicket success.
Callum Hutchinson (29), Jarryd Robinson (20) and James Lamb (16) led the way for Harbour, but Joe Lonsdale restricted them with a haul of 4-11.
Peterlee then squeezed home on 115-8, thanks largely to E. Dunn (37) and D. Greenfield (21), with Kieran Buck’s unbeaten 14 seeing them one in partnership with Lonsdale (13no). Lamb bagged 30287, with Rhys Slater taking 2-11.
Castle Eden edged home by six wickets against Murton, who made 95-4, with M.Hopkins making 40, backed by Luke Robson (15no) and Cameron Sykes (11). B. Ball (30) and L. Reed (25no) steered Castle Eden to victory.
Horden made 66-7, with Adam Hall (26) top-scoring, against Easington, with Dylan Richardson striking twice. Easington’s reply fell short on 50-5, with only J.Pigford (22) reaching double figures as Horden bowled brilliantly to keep the scoring down.
In the North East Division, Whitburn (81 all out) were sunk by 74 runs against South Shields.