John Scott's discussion about "face punching" in the NHL at the Player's Tribune is convenient here for reasons that won't be obvious because it's about Scott "face punching"*:
My first few years in the NHL, it was so bad that I wouldn't sleep. I'd stay up all night on HockeyFights.com and YouTube, researching the tendencies of the next enforcer on the schedule. Steve Macintyre. Eric Godard. I could go on and on. You'd see these monsters on the schedule weeks in advance, and your mind would already start racing.
This is the job we sign up for.