so I went looking and couldn't find anything to that effect. The only thing I saw was that the NFL is now tracking and publicizing concussion figures among players and the league is emphasizing that it's new kick return rule should reduce concussions in those limited situations. There's also improvements in helmets being studied.
From an article on nfl.com:
The number of concussions remained largely stable from last season -- 219, including those suffered in preseason and regular-season games and practices. That is up from 213 in 2022, but still well below the high of 281 a few years ago...
Sills said there were 422 evaluations for concussions last season and another focus of the offseason will be trying to figure out how to drive down the number of concussions. The league looks at those who suffer a high volume of head impacts -- like offensive and defensive linemen -- and those who are hit at high velocity, as typically happens during a tackle in space.
Among the promising developments is the success of the Guardian Cap, the extra layer of protection worn by some position groups during preseason and regular-season practices, which produced a 48 to 50 percent reduction in concussions for the position groups that wore them. And this offseason, the NFL expects as many as eight more position-specific helmets coming on the market for quarterbacks and linemen.
"Obviously, while concussions are stable, we want to see them go down," Sills said. "We believe the game can continue to be made safer."
https://operations.nfl.com/updates/the-game/nfls-prioritization-of-player-safety-leads-to-promising-injury-data-for-2023-season/
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