The visiting Rockets, who were defending champions, got out to early 3-0 lead in the top of the first inning courtesy of a two-run line drive from Terry Peppler.
But the host Posse put up four of their own to lead 4-3.
After the early offensive production, the game settled down.
Chris Baber hit a solo home run to put the Posse up 5-3 in the bottom of the third inning.
But, the Rockets were quick to respond scoring two to tie game in the top of the fourth.
The teams exchanged runs in the fifth for a 6-6 tie.
It was down to the final inning, and some Rocket power came to the forefront as Rhett Reeve hit a solo home run to give Rockets 7-6 lead.
The Posse could not find the run to tie the game in the home-half of the final frame and the championship was headed back to Rhein where it had resided the past year.
Terry Peppler was the winning pitcher with some fine defence from Bret Peppler at shortstop.
Jared Werth had a good day with the glove for Neudorf and second base.
While Drew Hoehn took the loss for the Posse.
Reeve was named playoff Most Valuable Player.
Action for the Rockets switches to provincials starting Aug. 13, in Saskatoon where they will combine forces with Whitewood.
The first game will see the team take on the Saskatoon Merchants at 2:00 p.m. Friday, followed by a game against the Earl Grey Rockets at 6:00 p.m. Saturday the Moose Jaw Canadians will be the first opponents at 2:30 p.m. followed by a game against the Conquest Capitals at 6:00 p.m.
