The Ada A's scored two early runs and made them stand up to shade the Blue Ox 2-1 Tuesday night in the regular season finale for both teams.
The 16-C sub-regional playoffs opened last night, three days earlier than scheduled, with the Ox hosting Thief River Falls. The same two teams meet again Friday at Thief River in their best-of-three series.
The third game, if needed, will be at Bemidji Sunday at 5.
Warroad and Roseau will play a similar series at the north border with the two winners clashing for the north title in a third series.
In the south, Ada, Crookston East Grand Forks and Stephen-Argyle will stage their tournament.
The two division winners will then clash for the region crown and a berth in the state meet.
Ada completed a home-and-home sweep with Tuesday's win, having won its opener at home 5-3.
Each team used three hurlers with reliever Ethan Opsal coming on in the fifth to get the win. Matt Schneider went seven for the Ox to take the loss despite a fine effort.
He yielded seven hits but worked out of difficulty in several frames.
Ada scored in the first on doubles by Adam Lee and Aaron Cook and again in the third on a single, wild pitch and Sam Kinne's double.
Bemidji left runners at second and third in the second inning but broke through in the third.
Garrett Harris doubled with one gone, advanced on a ground out and scored on his brother Landon's single up the middle.
Opsal came on to relieve Zac Salfer to start the fifth and proved tougher to hit. He allowed only two runners over the next four frames, one on an error
Kinne pitched the ninth and worked out of a bases-loaded jam before cementing the win.
Sol Schneider singled with one out and Jesse Jacobson walked. After a strikeout Garrison Harris also walked. But Bryan Jamison popped to second to end the game.
Bemidji stranded 10 runners while Ada left 12.
Joel Conway had two of the five Blue Ox hits. Kinne had two of Ada's eight.
Bemidji closed its regular season at 9-9.
Bemidji and Thief River divided their two twinbills, each winning on its home field.
Blue Ox 001-000-000---1--5--0
Salfer, Opsal (w) (5), Kinne (9) and Massman
M Schneider (1-2), Jamison (8), Fossen (9) and Jacobson
Roseau swept the final division twinbill from the Ox Sunday, 4-1 and 14-8 on its home field
The pair had split their first two games here.
It lifted Roseau to the division title and dropped Bemidji into a second place tie with Thief River. Warroad finished fourth.