Harpo Marx - Wikipedia, the free encyclopedia...

[Harpo] Marx was also an avid croquet player, and was inducted into the Croquet Hall of Fame in 1979.

And from the United States Croquet Association website:

Arthur "Harpo" Marx was a lovable, eager and very athletic croqueteer. Whenever he returned to Long Island or to Alexander Woollcott's island on Lake Bomoseen in the summer. Usually clad only in the briefest of trunks, (even when others were in flannels) Harpo would just bound around the court, laughing and stretching, mouth full of an entire pack of gum.

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