Sturgill was 4-for-8 with three doubles, six runs and four RBIs in three wins by a combined 46 runs.
Eller was 10-for-18 at the plate in three wins, alongside two RBIs and six runs scored.
Day replaces Richard Scott, who has spent the last four seasons at the helm of the program.
Jenkins was 15-for-20 at the plate with a home runs, eight doubles, 10 RBIs and 12 runs.
Waverly baseball coach Jeff Noble earned his 400th career win Thursday evening.
Miller, who has spent the last several seasons at Waverly, replaces Evan Legg after a three-year stint with the program.
Schaefer threw 31 innings, didn’t allow an earned run and struck out 47 while posting 10 hits at the plate.
Unioto coach Tony Taylor earned his 300th career win Friday with a 4-3 victory over Piketon.
Mohan accounted for 34.3 points, placing second in the 100-meter run, second in the high jump and winning both the 800-meter run and 400-meter dash.
With a two-run home run Tuesday night, Ohio University’s Morgan Geno set the program’s career RBI record.