Jeff Contir scored a game-high 23 points for Marathon, which received 19 from Cody Berry.
OHS will end its season Friday with a non-league game at Lansing.
UV 76, B-G 62
Justin Hofer scored a game-high 31 points to lead fifth-seeded Unadilla Valley (10-8, 9-4) in the Midstate Athletic Conference 5-8 Tournament final over visiting Bainbridge-Guilford.
Hofer became the all-time leading scorer at UV with varsity 1,134 points. Hofer surpassed 2005 graduate Tyler Lloyd, who finished with 1,132 points.
Hofer’s night included five three-pointers, 12 rebounds and six assists.
Austin Bauerle had a team-high 29 points for the seventh-seeded Bobcats, who received 15 from Corbin Palmer.
“We really had no answer tonight for Bauerle,” Storm coach Matt Osborne said. “We just tried to match up with him as best we could and put a couple of guys on him, but he really controlled the paint for them.”
Osborne said UV travels to Unatego on Wednesday for a first-round game in the Section Four Class C Tournament.
Harpursville 50, Afton 47
Justin Koranka had a team-high 14 points to lead 12th-seeded Harpursville to a road victory in the MAC 9-12 Tournament consolation.
Mason Dean contributed 10 points for the Hornets, who took a 21-18 lead into halftime.
Rick Parsons led 10th-seeded Afton with a game-high 16 points and 10 rebounds. Kyle Hinman contributed nine points and nine rebounds for the Crimson Knights.
Deposit 61, Hancock 48
Senior center Shane Winans finished with team-bests of 18 points and 18 rebounds for ninth-seeded host Deposit, which won the Midstate Athletic Conference 9-12 Tournament final.
Matt Mills scored 17 points, Gary Fineout contributed 10 and Zack Decker had 11 assists for the Lumberjacks (9-9), who took control with a 22-15 third quarter.
Tyler Philips scored a game-high 27 points for No. 11 Hancock, which got 10 points from Ryan Smith.
Deposit earned the ninth seed for the Section Four Class D Tournament and will visit No. 8 Southern Cayuga for a first-round game at 6 p.m. next Wednesday.