Exactly. Which is why you don't display toughness and physicality on your own teammates. If that guy had a 1% chance of earning himself a contract, that just went to 0,00000000000000001%. If you are known for physicality and hits (which Dillingham apparently is, considering he has been indefinitely suspended by the OHL for an illegal hit), tough shit. Try something else. You don't hit your teammates like that, never.
I went to twitter and looked at some of the replies on this hit. Shockingly, there are some Leafs fans who think it's fine because it's a clean hit (a small minority thankfully). What if Ryan Reaves knocked out Matthews during practice with a clean hit? Would that be fine too?