Mid Canterbury, Thames Valley taste defeat
Mid Canterbury and Thames Valley can no longer boast an unbeaten record after falling to North Otago and King Country respectively.
But Mike Mullins will be proud of his side, which edged home 19-18 thanks to Edward Keohane's contribution of 14 points with the boot.
The loss opened the gate for West Coast to edge out Wairarapa Bush for first place on the competition ladder.
Jason Wright, Kevin Moore, Maleli Mudu and Trot Tanwhare all crossed the whitewash to hand West Coast a bonus point 30-25 win over South Canterbury.
Meanwhile Wairarapa bush will remained in second place after they cruised past Horowhenua Kapiti thanks to some excellent kicking from Glen Walters (17 points.)
Four time winners of the Lochore Cup Poverty Bay sitting in the wooden spoon position after they surrendered a 14-8 lead at half time to go down 25-21 against Wanganui.
Week four results:
Buller 28 (Scott Neighbours, Penijamini Nabainivalu, Mike Schmidt-Lealava'a, Iliesa Ravundra tries; Jesse Elley con, 2 pen) East Coast 12 (Te Rangi Fraser, Riki Waitoa tries; Sikeli Vorenasu con)
King Country 27 (Pehi te Whare 2, Roy Simpson tries; Kurt Stracham con, 2 pen; Whakataki Cunningham 2 con) Thames Valley 22 (Lance Easton, Joe Murray, Brett Ranga tries; Kane Adams 2 con, pen) HT: 7-17
North Otago 19 (Ulisoni Taiatua try; Edward Keohane 4 pen, con) Mid Canterbury 18 (Joe Dampney, Johannes Lambrechts tries; Josh Nonu con, 2 pen) HT:10-11
Poverty Bay 21 (Sisa Vosaki 2, Leon Ake tries; Sam Parkes 3 con) Wanganui 25 (Lasa Ulukata 2 tries; Zyon Hekenui try, 2 con, 2 pen) HT: 14-8
South Canterbury 25 (Carlos Tuiloma, Theo Davidson, Matt Whetu tries; Sam Vaevae 2 con; Liam Edwards 2 pen) West Coast 30 (Jason Wright, Kevin Moore, Maleli Mudu, Troy Tauwhare tries; Tim Priest 2 con, 2 pen) HT: 6-7
Wairarapa Bush 22 (Paul Tikomainavalu try; Glen Walters con, 5 pen) Horowhenua Kapiti 15 (Etuale Tongia, Michael Tambour tries; Sonny McBride con, pen)