I'm sure all you'll do is play around with the semantics of using the word "severely," but because you asked, here you go:
https://www.outsideonline.com/1928696/truth-about-post-workout-beer
Again, anyone that lifts weights regularly knows that even two beers the night before will have an effect on your next workout; or, at least, a noticeable effect from if you'd never had a beer at all.
Recovery time, as "sourced" to your demands above, is also affected. And when you're not fully recovered and then you subject yourself to the demands of NFL-level practices and weight sessions, you're opening yourself up to a higher probability of physical injury.
This isn't rocket science. I love how people pile on like I'm being some giant asshole by SUGGESTING that Gronk's drinking habits likely increased his chance of injury.
You're all demanding proof yet the best quarterback of all-time that plays for your freakin' home team that's had an unbelievable run of good health doesn't drink for a reason. Looking at TB12, how can you actually argue at all that I'm being unreasonable? I get that you all adore Gronk (we all do), but use some common sense and stop acting like some helicopter parent when someone questions one of his known bad habits and how it may have affected his health.
BTW, pointing out how many "other" young players in the NFL drink is an obnoxiously-dumb counterpoint for pretty obvious reasons. I mean...really? Other players get hurt all the time - how can a message boarder prove which were direct or maybe indirect results related to alcohol consumption? Talk about a straw man.
These types of "debates" can never be won on SoSH because I could post a hundred links but the ultimate comeback will always be something along the lines of "well, other people get hurt!" or "how do you know whether Gronk drinks 1-2 beers or 20 beers!" These conversations never go anywhere.