Insurance? What underwriter would have touched that rider on a contract with the history of Buxton's injuries. Can you imagine the price-tag it would have been?
I am believing there is no insurance.
1st knee injury, 5/2019
Signs long term contract, 11/2021
Comes from an article "UNDERSTANDING THE BUSINESS OF BASEBALL: INSURANCE ON PLAYER CONTRACTS..."
Dated 2013 but relevant. https://metsmerizedonline.com/understanding-the-business-of-baseball-insurance-on-player-contracts/#:~:text=Most policies cover between 50,player is on the DL.
Another more current article: "The medical underwriting process includes an application and physical exam, and exclusions for specific pre-existing injuries or illnesses may apply...." https://awmcap.com/blog/mlb-draft-disability-insurance-overview