1958 Topps #464, Curt Flood RC.
Besides having a great first name, Curt Flood played a pivotal role in baseball’s labor movement by challenging the reserve clause in 1969, sacrificing his career to fight for players’ rights. His courage laid the groundwork for free agency, forever changing the balance of power between players and team owners.

It's a hot one, but made myself go outside. Glad I did!