“Some stances are just conducive to swinging. If I stand up straight for too long it's harder to swing. Plus my feet hurt.”

The Ballot or the Bullet (1964), Speech in Detroit, Michigan (12 April 1964)
Context: The government has failed us; you can’t deny that. Anytime you live in the twentieth century, 1964, and you’re walking around here singing “We Shall Overcome,” the government has failed us. This is part of what’s wrong with you -- you do too much singing. Today it’s time to stop singing and start swinging. You can’t sing up on freedom, but you can swing up on some freedom. Cassius Clay can sing, but singing didn’t help him to become the heavyweight champion of the world; swinging helped him become the heavyweight champion.

Source: Phenomenal Woman: Four Poems Celebrating Women

On how being right-handed negatively impacted his chances of batting .400, as quoted in "Aches, Pains... and Base Hits" https://news.google.com/newspapers?id=W6lWAAAAIBAJ&sjid=xecDAAAAIBAJ&pg=7036%2C4509721 by Jim Murray, in The Los Angeles Times (August 10, 1971). Also see the above comment (August 11, 1964) re "stepping in the bucket."
Baseball-related, <big><big>1970s</big></big>, <big>1971</big>

As quoted in "New Labour, new Ken? Think again as Mayor speaks" by Joe Murphy in Evening Standard (8 April 2004), p. 19.
Interview with The Guardian (7 April 2004)

As quoted in "Clemente Says Hitting Does Not Come Easy" https://news.google.com/newspapers?id=UagkAAAAIBAJ&sjid=xqAFAAAAIBAJ&pg=5876%2C6101257 by Ralph Bernstein (AP), in The Reading Eagle (March 26, 1968)
Baseball-related, <big><big>1960s</big></big>, <big>1968</big>

As quoted in Go for the Gold: Thoughts on Achieving Your Personal Best (2001) by Ariel Books
Context: I swing as hard as I can, and I try to swing right through the ball. In boxing, your fist usually stops when you hit a man, but its possible to hit so hard that your fist doesn't stop. I try to follow through in the same way. The harder you grip the bat, the more you can swing it through the ball, and the farther the ball will go. I swing big, with everything I've got. I hit big or I miss big. I like to live as big as I can.

Anarchist Morality http://dwardmac.pitzer.edu/anarchist_Archives/kropotkin/AM/anarchist_moralitytc.html (1890)
Context: The history of human thought recalls the swinging of a pendulum which takes centuries to swing. After a long period of slumber comes a moment of awakening. Then thought frees herself from the chains with which those interested — rulers, lawyers, clerics — have carefully enwound her.
She shatters the chains. She subjects to severe criticism all that has been taught her, and lays bare the emptiness of the religious political, legal, and social prejudices amid which she has vegetated. She starts research in new paths, enriches our knowledge with new discoveries, creates new sciences.
But the inveterate enemies of thought — the government, the lawgiver, and the priest — soon recover from their defeat. By degrees they gather together their scattered forces, and remodel their faith and their code of laws to adapt them to the new needs.

Beautiful Minds (2010)

I can do it gladly because I'm learning a little something. No matter how much they try to say that Brubeck doesn't swing — or whatever else they're stewing or whoever else they're brewing — it's factually unimportant.
Not because Dave made Time magazine — and a dollar — but mainly because Dave honestly thinks he's swinging. He feels a certain pulse and plays a certain pulse which gives him pleasure and a sense of exaltation because he's sincerely doing something the way he, Dave Brubeck, feels like doing it. And as you said in your story, Miles, "if a guy makes you pat your foot, and if you feel it down your back, etc.," then Dave is the swingingest by your own definition, Miles, because at Newport and elsewhere Dave had the whole house patting its feet and even clapping its hands....
An Open Letter To Miles Davis (1955)