Buckman scored two runs in the top of the ninth inning to erase a 2-1 deficit and earn a 3-2 victory at Lastrup, Sunday.
Shawn Lanners had the game-tying RBI and Nick Lochner had what proved to be the game-winner.
Corey Egan added two hits and Mark Kahl homered for Buckman.
Paul Herman went 4-for-5 with an RBI and Brandon Lochner picked up two hits and drove in a run for Lastrup.
Also in Victory League play Saturday – Sunday:
Randall 5, Opole 0
Kyle Peterschick threw seven scoreless innings and only allowed two hits as Randall shut out host Opole 5-0.
Pete Herman went 3-for-5 with a pair of doubles, while Eddie Wenzel, Matt Otremba, Ricky Drew, Dusty Parker and Kyle Peterschick all had two hits for Randall.
Upsala 2, Freeport 1
Adam Gerads hit a tie-breaking homer in the bottom of the eighth as Upsala edged visiting Freeport 2-1.
John Fuchs pitched two innings of scoreless relief to earn the win.
St. Stephen 9, Flensburg 1
Nick Krippner struck out 11 batters in 8 1/3 innings pitched as St. Stephen defeated visiting Flensburg 9-1.
Adam Hallberg went 2-for-4 with a run and threw 1 2/3 innings of scoreless relief for Flensburg.
Nisswa 5, St. Mathias 4
Luke Schumer had three hits at the plate and threw 3 2/3 innings of scoreless relief to earn the save and lead Nisswa to a 5-4 win at St. Mathias.
St. Wendel 2, Avon 1
Brandon Hellmann struck out 11 batters in a complete-game effort as St. Wendel won 2-1 at Avon.
Fort Ripley 11, Cuyuna 1
Fort Ripley’s Ethan Branum, Brett Kramer and Rhett Williamson teamed up to blank Cuyuna Range on one-hit in an 11-0 win.
Ray Austin went 2-for-2 with three RBIs at the plate.
Holdingford 6, Flensburg 2
Brandon Kiel struck out nine batters in a complete-game performance as host Holdingford topped Flensburg 6-2.
Paul Krebs homered for Flensburg.
Opole 5, St. Stephen 1
Zach Bialka worked around five walks and six hit batters to toss a two-hitter as Opole defeated host St. Stephen 5-1.
Nisswa 9, Royalton 1
Jason Roepke homered and drove in three runs and Brett Cloutier gave up just two hits over seven innings as Nisswa defeated visiting Royalton 9-1.