Peterborough need to collect just seven points from their final two Premier Division games to get their hands on the trophy for the third straight season.
Their 143-run thrashing of Old Northamptonians, coupled with Rushton’s failure to beat Brixworth, has opened up a gap of 54 points meaning to all intents and puroses, the title looks to heading to Bretton Gate.
On Saturday, 98 from Ashley Rodgers and a contribution of 51 by Callum French steered the hosts to 246-7.
And they had no problems defending this as the ONs were rolled over for just 103, Joe Dawborn taking 5-30.
At the Dallas Burston Grounds, Rushton were dismissed for 195 (Andy Reynoldson 58no) as Colin Sibley took 5-19 from his 17 overs.
Brixworth were never in the hunt in their reply but held on at 130-9 despite the best efforts of Marc Jackson who snared 6-35.
At the foot of the table, Burton Latimer fell agonisingly short of toppling Finedon Dolben.
Greg Evans (73) and Adam Nunn (53) dominated Finedon’s 225-8 (Damien Paul 5-42) but despite Chris Gilthorpe’s 82, Burton were bowled out for 221 (Chris Goode 4-39).
Burton are now 35 points below Stony Stratford who lost to Rushden by an emphatic 77-run margin.
Rushden totalled 173 (Alex Strong 6-52) before restricting the visitors to 96 (Will Sheridan 5-10).
Wollaston and Oundle shared the points with the latter taking the lion’s share.
Phil Adams top scored with 53 in Oundle’s tally of 214-7 and Oundle then came up comfortably short on 156-8 as Ben Graves took 5-22.
Leo Carter single-handedly steered Horton House to a six-wicket victory at Northampton Saints.
In reply to the Saints’ 209 (Chris Park 50), Carter plundered an unbeaten 161 from just 107 deliveries with 116 in boundaries as the target was chased down in under 35 overs.