Source : WordNet®

lefty
     n 1: a person who uses the left hand with greater skill than the
          right; "their pitcher was a southpaw" [syn: {left-hander},
           {southpaw}]
     2: a baseball pitcher who throws the ball with the left hand
        [syn: {left-handed pitcher}, {left-hander}, {left hander},
         {lefthander}, {southpaw}]