For some professional athletes, it's a difficult task to decide when it's time to call it quits.
Some guys, like former San Antonio Spurs big man David Robinson, know when it's time to go.
Others, like the NBA great and MLB failure Michael Jordan, just can't give up their beloved game.
Luckily, for the following MLB players, we're doing the work for them.
Here are six MLB players who will (or should) be calling it quits following the 2013 season.