"Here you see him swinging against Jon Matlack on September 30, 1972. The swing resulted in his 3,000th hit, a double to [left] center and the last hit of his career. This is kind of unfortunate, since looking at it now, it’s obvious that it’s not going to be a good swing. I think he’s been fooled by the ball. I think he was probably looking inside and the ball turned out to be away. Consequently, he’s not well balanced and is squatting down a bit. I think he may have [tried to] check this swing but was unable to stop it. Nevertheless, it’s a tribute to his great body control that he still hit it the way he did. It’s the kind of control you often find with great athletes, men who combine strength with flexibility to create a smooth, graceful motion. I think you find that players of Clemente’s caliber also tend to use good mechanics almost naturally, without really having to think much about them. Clemente, for example, stood off the plate, yet he still coped effectively with the ball outside. He had excellent arm extension and, in fact, was one of the first players I noticed taking his top hand off the bat. Nor did Clemente try to pull the ball. In fact, I think he made a conscious effort to hit the ball the other way. He counted a double to right center the same as a double down the right field line, and I think he was proud of the fact that he could do both. All good hitters use the whole field."
January 1, 1970
https://en.wikiquote.org/wiki/Roberto_Clemente