The Cardinals interviewed former team catcher Mike Matheny to replace Tony La Russa. Matheny’s career ended due to a concussion, and his forced the sport to take the injury more seriously. Cognative issued bothered Mathney the most, but they seem to have gone away.
“My problems were always with the cognitive stuff, not being able to put things together or even being able to speak right at times. It was bizarre how my concussions went. The headaches and that sort of stuff were there, but they weren’t any big deal to me. I could just tell my mind wasn’t working right.”
It would be great to see him return to the cognitive part of the game. Check out that last link for a sample of how he helped pitchers.