At age 94, Marvin Miller walks slowly, with the aid of a cane. But the man who transformed baseball as the executive director of the Major League Baseball Players Association from 1966 to 1983 is still sharp of mind and memory.

Miller has a memory that he wanted to share of another nonagenarian, retired U.S. Supreme Court Justice John Paul Stevens, 91, who played an important role at a key moment in the development of players’ rights nearly 44 years ago.