Thorn Parkes, who earlier took two wickets for 38 runs, topscored for the Bay with 51.
Peter Kapene was next best on 21.
Counties Manukau won the competition with a nine-run win over Northland in a nail-biting final.
Tyler Jerram (91) batted through 39 overs to anchor Counties Manukau’s 185, as wickets fell around him with regularity.
Marcel Marconi, 27 off 34 balls, also dug in for his team.
At 174-7, Northland looked on course, with Sean West (31) and Liam Wewege (30) set to get them home.
However, when Wewege was caught off the bowling of Andrew Carny with no addition to the score, Counties Manukau had a sniff.
Strike bowler James Naylor then trapped West leg before wicket to have Northland on the brink at 176-9.
Three balls later, Naylor trapped Kurt Oldridge in front for a duck.
Results Playoff for 1st/2nd: Counties Manukau 185 (T Jerram 91, M Marconi 27; C Boswell Smith 2-30, K Oldridge 2-39, H Kidd 2-40, S Webb 2-30 ) def Northland 176 ( L Trigg 33, S West 31, L Wewege 30, H Kidd 27; J Naylor 3-34, H Hill 2-31, D O’Brien 2-8) by nine runs.
3rd/4th: BOP Coastland 245-9 (M Collett 50, M Leef 45, C Riley 30; Z Corban 3-43, J Gifford 2-33, J Glass 2-19) def Hamilton 187 (W Kingsbury 53, C Townsend 49, C Burgess 26; D Crombie 3-43, M Leef 3-24) by 58 runs.
5th/6th: Waikato Valley 45-1 (G King 23) def BOP Lakelands 41 (T Houston 4-15, B J Kane 4-12) by nine wickets.
7th/8th: ND Invitation 242-5 (T Pringle 91, J Sahota 43. M Turner 33; T Parkes 2-38, J Colbert 2-51) def Poverty Bay 193 (T Parkes 51, P Kapene 21, J Colbert 20; G Ott 3-19, A Pabla 2-24) by 49 runs.