Its a complex calculation - WE and potentials together. With the right potentials, plenty of cases of 100+ growth in first season and large growth thereafter
this guy with nice potentials and 80 WE up 111 first season, up 18 in offseason, up 86 as soph and still improving
https://www.whatifsports.com/hd/PlayerProfile/RatingsHistory.aspx?tid=2398&pid=3589230