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Optional Claiming Race Designation Optional claiming races are indicated by a superior "O" immediately pre-ceeding or following the claiming price. A superior letter "O" preceeding the claiming price indicates that the horse was not entered to be claimed. A superior letter "O" following the claiming price indicates that the horse was entered to be claimed.., .Note: The latter, is being, used only for optional claiming races run on br after April 10, 1954.
