Or, and hear me out on this one, maybe it's the fact that he CROSS CHECKED A GUY IN THE FACE and has done it before. Maybe, just maybe, the league is trying to send a message to Landeskog to stop doing this?
Or, just hear me out on this, just like everything in this world, that's not the ONLY factor. You know common sense based on the evidence. Otherwise Trouba couldn't get away scott free with hitting an Avalanche player in the head and concussing him for four games.
Somehow Trouba's play is worth 0 games and no penalty under Pronger, yet three months later in the same season he does pretty much the same thing to an Ottawa player and gets suspended 2 games.
Now Parros deems this unintentional play as worthy of 4 games despite Tkahcuk embellishing and being uninjured. There's that big a discrepancy, and the only reason is because Landy has cross checked someone in the head before? Yeah, I got a bridge for you too.
Just to review:
This play resulted in a concussion for Duchene who missed 4 games, and got no penalty, no fine, and 0 games suspension.
Same player (Trouba) three months later on a pretty similar play against Ottawa gets him suspended for 2 games.
Dubisnky cross checks Crosby to the head, and gets 1 game suspension. No concussion, no missed games.
Three and half months later in the same season, Landeskog gets suspended 3 games for a similar play. No concussion, no missed games.
An intentional and dangerous cross check to the back of Couture's head, gets Hoffman suspended only 2 games.
No fine, no suspension. Crosby missed one game with a concussion.
No fine, no suspension.
No penalty, no fine, no suspension.
Seemingly no injury or concussion, clear embellishment from a known diver, Landeskog suspended 4 games.