Republic scored four runs in the first inning, five in the second and three more in the fifth to beat Joplin 12-0 on Thursday.
Avery Romans earned the win after pitching a complete-game shutout in five innings. She scattered four hits, struck out four and walked one.
Jill McDaniel took the loss after allowing nine runs on seven hits, two walks and two strikeouts.
Emi Essary, AJ Fenske and Mara Lakey homered for the Tigers. Claire Summers doubled. Kaitlyn Ragsdale finished with three hits and two runs scored, while Fenske had three hits, two RBI and two runs scored. Lakey and Essary each had two hits, with Lakey driving in one and scoring once and Essary driving in two and scoring one.
Bailey Ledford and Madisyn Tracy each had hits, while Liz Snider doubled for the Eagles.
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Joplin (4-15) travels to Aurora on Tuesday.