The Umpire

From Homestar Runner Wiki

The Umpire is the official for Homestar's baseball team. His first (and only) appearance was in Where My Hat Is At?, where he tells "the" Homestar Runner that, without his hat, he is not allowed to play in the Big Game. After Homestar finds his hat, the Umpire yells, "SAFE!" as Homestar runs across home plate.