Umpires wanted for 2021 Season: If you are interested in umpiring this season please contact Marilyn -

All umpires must attend a Baseball Ontario clinic.
Baseball Ontario's Umpire Page.


View -> Thunder 2021 Covid Rules

View -> Thunder 2021 House League Rules

View -> Baseball Ontario Rules

View -> Official Rules of Baseball

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View -> Thunder 2021 Senior Division Rules

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please contact our Umpire Assignor: Marilyn Eimers

Supervisor of Umpires: Kyle Cox

Umpire Assignor: Marilyn Eimers