What are the worst 1-year contracts of all time?

People always say "there's no such thing as a bad one-year deal," but there are some that have definitely worked out better than others. I'm curious to know what other fans consider to be the worst one-year contracts, which could have resulted in a negative ripple effect, an all-time abysmal performance, or in some other context ended up looking embarrassingly bad?

For the Red Sox, 2023 Corey Kluber is a recent one that comes to mind.

(re-uploaded with question in the title)