WSB 2K3 adds all-new ESPN broadcast presentation, more classic uniforms for every team, player-specific batting stances and pitching styles for Hall of Fame players, and historic ballparks. WSB 2K3's gameplay include: a jump button for home run-robbing snatches and line drive-snaring grabs, user-controlled leadoffs, broken bats, drag bunts, improved animations, power swings, and more.
- Classic Ballparks – Take the field in some of baseball's most historic ballparks including: The Polo Grounds, Forbes Field, Shibe Park, Crosley Field, and Griffith Stadium.
- More Retro Unis and Alternate Tops – Classic home AND away unis and alternate tops for every MLB team.
- Hall of Fame Legends – Play as or against over 25 Hall of Famers featuring player-specific batting stances and pitching styles for the greatest to ever lace 'em up including: Bob Gibson, Mike Schmidt, Rollie Fingers, Stan Musial, and more.
- New and Improved Animations – Home run-robbing snatches at the wall, line drive-snaring grabs, new double play turns, broken bats, beaned batters charging the mound, drag bunts and even more player-specific batting stances and pitching styles.
- Enhanced Gameplay – New baserunning mechanism, user-controlled leadoffs on the basepaths, power swing for aggressive hitting, and an all-new jump button for even more control in the field.
- Weekly, Monthlyand Season Awards – Multiple awards are up for grabs, from Player and Pitcher of the Week/Month honors to the serious hardware, including: Rawlings Gold Glove, Louisville Silver Slugger, Rolaids Relief Man, Rookie of the Year, Cy Young, and MVP.
- ESPN Broadcast Presentation – True to the sports fan, player introductions, game highlights, replays, scores, and more are displayed in the famous ESPN style.