MLB Slugfest 2004, often stylized as MLB Slugfest 20-04, is a baseball video game published by Midway Sports in 2003 for the GameCube, PlayStation 2, Xbox and Game Boy Advance. It is the second game in the MLB Slugfest series. Jim Edmonds from the St. Louis Cardinals is the cover athlete.
The game received "generally favorable reviews" on all platforms except the Game Boy Advance version, which received "unfavorable" reviews, according to the review aggregation website Metacritic. GamePro said of the game, "Even if you wouldn't normally play a baseball game, give MLB SlugFest 20-04 a rent, if only to hear the awesome audio."