“Accidents will happen
We only hit and run
He used to be your victim
Now you're not the only one.Accidents will happen
We only hit and run
I don't want to hear it
'Cause I know what I've done.”

As quoted in "Bob Says 'They Try': Feeble Pitching Takes Joy From Clemente's Night" https://news.google.com/newspapers?id=hBFOAAAAIBAJ&sjid=h_0DAAAAIBAJ&pg=5612%2C2872741 by Charley Feeney, in The Pittsburgh Post-Gazette (Wednesday, May 17, 1967), p. 26
Baseball-related, <big><big>1960s</big></big>, <big>1967</big>

On his chances for a third consecutive NL batting title; as quoted and paraphrased in "Clemente Not Thinking of Batting Title" by Milton Richman, in The Cumberland Evening Times (Tuesday, March 15, 1966), p. 12
Baseball-related, <big><big>1960s</big></big>, <big>1966</big>
Context: “I never think about that before the season. Toward the end of the year I start thinking about it. Not before. I did it last year by just meeting the ball,” he said. “I didn’t swing hard at all. I think I’m going to do the same thing this year. We have two good hitters behind me now and I don’t have to swing so hard.” He means Donn Clendenon and Willie Stargell. The two hit a total of 41 homers to Clemente’s 10 last year. “They always say we need someone to hit home runs. We got some guys who can now. I don’t care for home runs. I showed ’em I could do it when I hit 23 in 1961. Home runs aren’t that important, though. Not to me, anyway.”

As quoted in "Murtaugh Takes Pirate Reins" https://news.google.com/newspapers?id=zUEqAAAAIBAJ&sjid=_k0EAAAAIBAJ&pg=5107%2C910504 by Les Biederman, in The Pittsburgh Press (Sunday, August 4, 1957), Page 2, Sect. 4
Baseball-related, <big><big>1950s</big></big>, <big>1957</big>

As quoted in Baseball's Greatest Quotes (1982) by Kevin Nelson; reproduced in "Morning Briefing: Babe Ruth Was Not a Superstitious Man, Except on 714 Occasions," in The Los Angeles Times (March 1, 1982), p. D2
Unsourced variants:
Just one.Whenever I hit a home run, I make certain I touch all four bases.
I have only one superstition. I touch all the bases when I hit a home run.

Source: Something Wicked This Way Comes

Press conference, reported in Jacob Bogage, " ‘I wanted to hit a couple of those speakers so hard', Trump says of Democratic convention https://www.washingtonpost.com/news/morning-mix/wp/2016/07/29/i-wanted-to-hit-a-couple-of-those-speakers-so-hard-trump-says-of-dem-convention-critics/", The Washington Post (July 29, 2016).
2010s, 2016, July

Source: Moonrise Kingdom

Source: Infinity