MLB umpire job responsibilities
John Tumpane - Wikipedia
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MLB umpire under fire after latest series in Milwaukee - Brew Crew Ball
MLB Umpires Have Best Statistical Season in History - Stadium
They Call 'Em Like They See 'Em - Twinkie Town
A final look—and laugh—at 2013 - Twinkie Town
Roberto Ortiz makes MLB umpire history as league replaces Joe West, other retirees
MLB to host Umpire Prospect Development Camp