MLB Dugout Heroes. This game features cartoon versions of all-star players and MMO-like gameplay. Visit the official website for more information and to register for an account.
"MLB Dugout Heroes is the first fully licensed and online-based PC baseball game in North America, featuring all Major League Baseball players and stadiums from the past and present. In addition to the MLB-licensed game features, the game has many unique gameplay attractions. Its unique leveling system allows players to grow stronger and better as they continue through the game. Special points are given to players as they complete baseball missions (quests) given daily or weekly, and these points can be used to purchase new players, uniforms, items, and more!"
Download the MLB Dugout Heroes Full Client (395 MB)