Player Traits stumbled upon

Go to view team.  Then go to view player card for any player.  Move to “more” at the top of player tab, and look at stats.  Once you are there, open the tab and look for traits.  There is a whole list of traits for each player.

QBs have personality traits like intense, leader, or team player.  They also have sense of pressure, decision maker, tight spiral, and penalty tendancy.

each player has a list that is wide ranging.  What is this?  I have never seen it, and stumbled across it.