Clayton Kershaw is a perfect example of why some of these players break down as soon as they hit 30, all you have to do is look at his physique, obligatory
Signs for major money well into his 30s but can't be bothered to eat right, stop drinking, and stay in the gym.
No surprise he's constantly on the DL with back and knee issues.
You then go on baseball reference and click on 2018, his age 30 year, and below that you see zero Cy Youngs, MVPs, no bold or italic numbers.
Then you see him during the celebrations without a shirt (again, Dame) and it all starts making sense.