Isn’t the idea of drafting someone in the first couple of rounds to get a player that can immediately impact your team? Why draft a guy who’s not as good now because he might develop into a star just in time for you to have to resign him to a second contract?
Like I said, all things being equal, of course a younger guy is a good move but if you’re concerned about adding impact players on a rookie contract (which is pretty much all the NFL is about) why would you not take a finished product who can start fo you right now? Get five years of peak production on a rookie contract and then let someone else overpay him when he’s on the downside of the age spectrum for NFL players.
Precisely what I'm saying. They are not as good during their rookie contract. Because if a player is having production as a 25 year old against college players, typically, NFL teams believe they will not be near as good against NFL players. The data bears this out.
I'm not talking about second contracts at all. I am talking about their rookie contract. Older players simply are not as good as their younger counterparts. It makes sense if you think about it. An 11 year old playing average on your 14 and under team is far better than a 14 year old on the same team.
This is just DL in case you like to see it for all DL. Of course there is inherent bias in the numbers and the paper went far deeper into that angle and accounted for it, of course, but just pulling up the raw data and presenting it here for the point, it holds regardless of round, age bucket, position etc.
The bias is, that players tend to declare as soon as the NFL draft tells them they'll be a high draft pick. And you only make it to age 25 by having warts through injury, redshirting, not being valued highly enough to declare etc. The sample size is also small enough to require further analysis (which I did and accounted for with statistical terms such as Ballast etc.) and it pretty well holds throughout that the best players on their rookie contracts are the youngest. Again, a talent proxy is administered because the most talented declare the quickest, but overall, you'd expect younger to be best on their rookie contracts.
The NFL Draft essentially ends around pick 108, as it is mostly flat from there and teams should probably value picks after that as mere dart throws overall.
Fun topic, appreciate the back-and-forth. I don't have it all figured out or I'd be making millions for some NFL team. It is fun to see the results of different studies and how much signal there does seem to be in the age discussion for NFL draft picks.