Juwan Howard has been punished for smacking an opposing coach during a wild altercation over the weekend ... with Michigan reportedly banning the guy from the Wolverines' sidelines for the rest of the regular season.
Yahoo Sports' Dan Wetzel just reported the news ... one day after Howard kicked off a brawl at the end of the Michigan vs. Wisconsin game by taking a swipe at Badgers assistant Joe Krabbenhoft.
The ban would effectively be a 5-game suspension for Howard .