If you want to edit existing players in certain modes or boost your created player, you have to "purchase" the rights using FCC (Football Club Credits).
If you are playing on PC and want to bypass the level requirements or edit more advanced data like player age or stats, you can use third-party tools: Cheat Engine fifa 15 unlock edit player
To fully customize players in or Tournament Mode : If you want to edit existing players in
Once you have unlocked a player, you can edit their stats, appearance, and abilities. Here's how: Alternative: PC Mods & Cheat Engine In ,
: Core details like name, height, nationality, and position typically remain locked. Alternative: PC Mods & Cheat Engine
In , unlocking the "Edit Player" feature is essential for customizing player aesthetics within Career Mode. While it offers a layer of personalization, its impact is limited by restrictive mechanics and the age of the game's servers. How to Unlock "Edit Player"