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Umpire Resources

Umpire Signups are NOW OPEN for 2019!

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Umpire and Referee Tax Form

Please fill out and return this IRS W-9 form to the "Completed Ump Cards" folder in the ump binder at the snack shack or mail/deliver it to the OSAA office..

Mark Opheim

Director of Umpires

Umpire and Referee Scheduling System

Joe Hutchings

OSAA Director - Technology


Umpire News and Announcements