Philipsburg-Osceola suffered its first loss of the season as the Lady Mounties dropped a 5-1 decision to DuBois on Monday.
Leading 1-0, DuBois took control with three runs in the second inning. P-O committed four errors, which led to four unearned runs.
Kenzie Burge has two hits for the Lady Mounties (10-1), who were without shortstop Abby Showers. McKendz Kephart drove in the lone run in the seventh.
Shelbie Jamison had two hits and drove in two for the Lady Beavers.
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Raechel Henry threw a five-hitter for DuBois.