First the shirt rule, it is to damn cold in the winter time to not wear sweatshirts and layers. He is going to learn fast, Mr Fleck that today's kind of cold and nippiness is common place in January and first weeks of February. Cold weather gear is important.
Instead of insisting on a dress code for players to wear collar shirts to class, he should insist on University of Minnesota Students to quit wearing G-Damn Badger, Iowa and Nebraska gear on campus so much. Getting the lot of students to not show up in pajamas now a days is a bit of a stretch.
That should be the first priority of business addressing the student body from Wisconsin about wearing all of that fricking Badger or the Iowa students wearing Iowa Hawkeye gear.
The players are working for free, not all of them have wealthy parents and wear the warm up gear and free clothing a lot for a reason.
The collar shirt rule is stupid, office dress is even more casual now then that. A dude in a collar shirt and sagging a$$ sweatpants isn't any more ideal than a dude in a sweat shirt and jeans. I get the coach want's a business like approach, but that is silliness requiring a collar shirt.