This is a deeper cut than most mentioned but if there are any Mets fans on the board you might remember the name Brian Cole. He died in a car accident at the age of 22. He was the number 64 prospect in all of baseball heading into 2001.
This is the line from his last season between A and AA:
137 games, 19 homers, 86 rbi's, 69 SB, 301 average.