1 How old is the player?
2 Month of birth
3 At what age did he start playing soccer?
4 Does he currently play in a club?
5 What level does he currently play?
Structure of levels is different from country to country. Please interpret the 1st division as the absolutely highest level for his current age. The higher the level the kid plays,greater possibility of becoming a pro. Although the influence is lower at the lower ages.