ballplayer(n = noun.person) baseball player - an athlete who plays baseball;
is a kind of athlete, jock, participant, player
has particulars: base runner, runner, batsman, batter, hitter, slugger, fielder, little leaguer, big leaguer, major leaguer, bush leaguer, minor leaguer, hurler, pitcher, twirler, utility man, aaron, hank aaron, henry louis aaron, berra, lawrence peter berra, yogi, yogi berra, dimaggio, joe dimaggio, joseph paul dimaggio, gehrig, henry louis gehrig, lou gehrig, mantle, mickey charles mantle, mickey mantle, mays, say hey kid, willie howard mays jr., willie mays, john joseph mcgraw, john mcgraw, mcgraw, musial, stan musial, stan the man, stanley frank musial, leroy robert paige, paige, satchel paige, jack roosevelt robinson, jackie robinson, robinson, babe ruth, george herman ruth, ruth, sultan of swat, ted williams, theodore samuel williams, williams, carl yastrzemski, yastrzemski, cy young, danton true young, young

   an athlete who plays baseball. [WordNet 1.5]