Not every offense committed by a juvenile is a juvenile offense. Also, the age between "juvenile" and "adult" can be different in different states. It's possible that either those weren't juvenile offenses (and Feagin's were) or he wasn't a juvenile when he committed it (and Feagin was). If that makes sense.
“On the offense last year, they had great spacing. That’s what I remember. Great spacing, great shooters, like Nik Stauskas, who’s not there right now. But they always have someone to fill the roles. They have a cutting offense, kind of hard to guard.”