Page Notes  
Umpires are tracked since 1957. This is a list of all Umpires in the system whose last name begin with O. Clicking the umpire will display a separate Umpire page (different than Player Page).

Click on the Umpire's Name to see Umpire Metrics. The Bio page is the regular Player page which also applies to other baseball people.
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Umpire Listing for Last Name Starting with 'O'

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Umpire NameBio PageYears RangeGamesPosHtWtBaThBorn DatePlace Of Birth
Jim O'BrienBio Page1979-197910UMP------------------
O'ConnorBio Page1982-19821UMP------------------
Jim O'ConnorBio Page1978-197917UMP------------------
Tom O'ConnorBio Page1979-19793UMP------------------
Jake O'DonnellBio Page1968-1971489UMP6-3215------1937-01-25Philadelphia,PA
Brian O'NoraBio Page1992-20182915UMP6-1210------1963-02-07Youngstown,OH
Jim OdomBio Page1965-19741593UMP5-11190------1921-07-16Bennettsville,SC
Ed OligerBio Page1979-19795UMP------------------
Andy OlsenBio Page1968-19801855UMP6-1200------1930-11-30Brooklyn,NY
Roberto OrtizBio Page2016-2018142UMP------------1984-12-16Caguas,PR
10 record(s)
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