Source : Webster's Revised Unabridged Dictionary (1913)

Fielder \Field"er\, n. (Ball Playing)
   A ball payer who stands out in the field to catch or stop
   balls.

Source : WordNet®

fielder
     n 1: a member of the baseball team that is in the field instead
          of at bat
     2: a member of the cricket team that is fielding rather than
        batting [syn: {fieldsman}]