There is a great story today in the DMN of a 17 year old Rowlett kid who signed a baseball contract with the Colorado Rockies that would have given him a $460,000 signing bonus.
Last summer he reports to their minor league club in Idaho. After three days (which included a bus trip to Utah and a stop for lunch at Albertson's), he said "screw it" and walked away. He never received a dime of the $460,000.
Now he can't play for any college because he technically became a professional when he signed the contract.