Over the course of baseball history, very few players leave the game on their own terms. Sometimes, injuries force them out. Often, their skills have eroded but they just can't bring themselves to call it a career. So they hang on for the sake of hanging on, until no one wants them. Craig Biggio had a different plan. He wanted to go of his own volition, and he's doing just that. On Tuesday, Biggio revealed he's retiring from baseball, effective upon the conclusion of the 2007 season. Sept. 30 will mark Biggio's final game, ending a potential Hall of Fame career that spanned 20 years and produced more than 3,000 hits, in excess of 650 doubles, nearly 300 homers and six postseason appearances. Biggio is grateful to be one of the few to leave the game with dignity, but that's just one of a myriad of emotions that have gripped him since he made this decision months ago. This is an incredibly sad time for the second baseman, and the next two months will be understandably difficult.