Marchand has been under fire basically his whole career for doing things that are considered dirty, such as slew footing and even licking players between whistles. Toronto Maple Leafs coach Sheldon Keefe notes that he is very good at what he does, calling it an art.
During the Stanley Cup Playoffs, desperate Leafs fans have noticed that Brad Marchand is not wearing his jersey properly, as his sleeves do not reach the cuff of his glove, which is in violation of NHL rules, although rarely enforced.
Although this is quite a ridiculous thing to point out, as Marchand is not the only one to do this in the NHL, it does show that Marchand is a master at not following the rules and getting away with it, much to the dismay of the Leafs, and their fans.