Rushton were knocked off the top spot in the Hevey Building Supplies NCL Premier Division after they were held to a draw by Finedon Dolben.
With Peterborough squeezing past local rivals Oundle, Jon Carpenter’s side now trail the defending champions by seven points.
At Avenue Road, Rushton, having been put in, were bowled out for 180 in 54 overs.
Will Sneath and Chris Goode took 4-32 and 4-39 respectively for the hosts while Carpenter top scored for the visitors with 52.
Finedon only faced 34 overs in their reply and they closed 45 runs short of their target on 134-7.
At Bretton Gate, Peterborough got the better of Oundle by two wickets in a low-scoring encounter.
Only Alex Martin (26) got past 20 as Oundle scraped their way to 137-9 in their allocation with the consistent Paul McMahon the pick of the home attack with 4-43.
The reply was far from straightforward but the efforts of Petrus Jeftha (4-37) proved to be in vain as Lewis Bruce (47) ensured his side took the spoils.
Old Northamptonians made short work of Horton House as they kept their challenge on track.
Afaq Babar’s 5-41 kept Horton to an under-par 116 (Shiv Jhala 54) but this was raced past as Rob White (55) and Richard Hudson (54no) steered the hosts to their target in the 21st over.
Rushden are now in fourth after they were beaten on home soil by Wollaston.
At Short Stocks, Chris Perry’s side scored 248-6 (David Shelford 83no, Gareth Griffiths 4-55) and this wasn’t threatened as Rushden were bowled out for 194 in under 40 overs.
Mikey Phillips top scored with 53 while Steve Musgrave took 4-62 for the victors.
Burton Latimer’s hold on a top flight spot is looking increasingly weak after their 11th reverse in 13 games.
Against Stony Stratford, Burton, who are now 64 points from safety with nine games remaining, were bowled out for 162 as the Stony attack shared the wickets around.
Russell White then finished unbeaten on 46 as the visitors reached 166-5 in the 41st over.
The other game of the round saw Northampton Saints get the better of Brixworth by three wickets at Birchfield Road East.
Callum Berrill’s 107 dominated Brixworth’s 218-8 with Ali Hasnain (4-31) the standout performer with the ball for the Saints.
Zak Harvey (77) and Tom Bradbeer (63) then enabled the Saints to total 222-7 to ensure Ashley Satrmer’s efforts of 4-57 came to nothing.