I've heard from multiple sources due to his youth Sanders was having trouble with the playbook. Just my opinion, but if you start Brown this year you have to start him next year according to Gundy's standards. I think this is the case. Now you can let Sanders start without feeling the obligation to start Brown due to a pretty good season. That would have been a bad situation with a good chance Spencer transfers out. Sanders is a gamechanger while Brown is a good QB.