"Clemente, Mays, Aaron. Koufax didn't worry too much. Perhaps he didn't have too much to worry about, but free from worry, he was able to concentrate more. "The good hitters are going to hit you," he explained. "You can't get 'em out all the time. And they're not the guys you have to get out to win. Maybe there are two good ones on each team and they're going to get two hits each. That's only four hits, so you must keep the others under wraps. They're the one who beat you." Koufax placed Roberto Clemente, Willie Mays and Hank Aaron in one category as hitters. "Mays always told me how hard it was to get a hit off me and every time I looked up, he was on second base. Yet, even with Mays, I had an idea what to do. When I pitched to Clemente and Aaron, I had no idea. They seemed to hit everything.""
January 1, 1970
https://en.wikiquote.org/wiki/Roberto_Clemente