"In my heart, I know it's the right thing to do...There's only one way to play this game since I was a little kid, to play fast, to play physical to play strong. And at this point I don't know if I'm able to do that anymore," he said. "And that's the part that's most difficult. I still want to play, but I don't think it's the right decision."
Kuechly has played in 16 games in each of the past two seasons, but suffered reported concussions during the 2015, 2016 and 2017 seasons.
https://www.si.com/nfl/2020/01/15/luke- ... y-panthers
Kuechly is just 28 years old and arguably at the peak of his game. Given the physicality of the position he plays, I don't think anyone can criticize him for making this decision. And unlike Andrew Luck's retirement, the timing was right, occurring now before free agency and the draft, giving his former team plenty of time to adjust to his leaving.