I think Rinaldo is a goon but don't have that much a problem with what he did tonight against the Avs. First makes a big clean hit on MacKinnon, then Girard skates after him and he 1 punches Girard. I get that Rinaldo threw the punch early but I can't help but wonder WTF was Girard doing? Why are you skating after Rinaldo if you're not ready to throw down in that situation? I guess just chalk it up as a rookie mistake made by a 19 year old, but he'll learn from it, Don't go around trying to posture/send a message if you're not ready to back it up.
Also I'm sick of scrums after clean hits. Either accept you/your teammate got rocked and look for an opportunity to throw a hit of your own as payback or actually fight. Nothing ruins the flow of the game like all the players grouping together shoving and face-washing each other.