When Sammy Sosa hit his 500th career home run on April 4, 2003 at Great American Ball Park, Dominicans and baseball fans alike were rejoicing in the streets. 4 months later, his 500th home run ball sold for $44,830 at auction. Offered is a game ball used in that milestone game, authenticated by Major League Baseball. Official Major League baseball shows great use with rubbed up stadium dirt.