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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 or after April 10, 1954.
