It wouldn't matter if the Leaf Doctor was on hand anyway. They don't mess around with head injuries (assuming it was just that and not a rib or shoulder). If a Doctor reports the symptoms to the league spotters and the player can't pass the concussion protocol, then the team has no choice but to pull the player anyway.

I am not sure what teams do about taking their own doctors on the road, whether they just share resources, or what happens. Any NHL team Doctor is going to act in the best interest of the player's health no matter who he plays for, visiting team or otherwise.....

(I'm also not Loucks - but you know, whatevsalad)