First time poster long time reader (Since Version 5).
In the manual it says that players move on to the draft when they reach the maximum age. I created a fictional world where one league had a feeder league where the maximum age is 19 and the minimum age is 10 (for fun). I also (for fun) decided to give a 10 year old perfect rating to see what would happen in his career. After the season for some reason his team released him. I looked for him but he wasn't in free agency. At draft time, sure enough, he was in the draft. That means there is now a 10 year old in the major leagues (with perfect ratings none the less). I also noticed that other players from the feeder leagues were also released.
Considering the manual says there is no early entry into the draft it is either a designed loophole or a bug. I guess he challenged the no-early-entry rule and won.
Thought that I'd point it out