This has been widely attributed to Whitman, and no one else, but without definite source. It has sometimes been cited as being from the Brooklyn Daily Eagle (sometimes with a date of 23 July 1846), where Whitman had been an editor, but its presence on that date is not apparent in the online historical archives http://www.brooklynpubliclibrary.org/eagle/ of that publication. <br class="br">Brian Cronin, in "Did 'Bull Durham' misquote Walt Whitman on baseball?" http://www.latimes.com/sports/sportsnow/la-sp-sn-bull-durham-baseball-20120328,0,5200453.story, Los Angeles Times (28 March 2012), suggests that this is (loosely) paraphrased from a remark of September 1888 reported in Horace L. Traubel, With Walt Whitman in Camden, Vol. 2: <br class="br">I like your interest in sports ball, chiefest of all base-ball particularly: base-ball is our game: the American game: I connect it with our national character. Sports take people out of doors, get them filled with oxygen generate some of the brutal customs (so-called brutal customs) which, after all, tend to habituate people to a necessary physical stoicism. We are some ways a dyspeptic, nervous set: anything which will repair such losses may be regarded as a blessing to the race. We want to go out and howl, swear, run, jump, wrestle, even fight, if only by so doing we may improve the guts of the people: the guts, vile as guts are, divine as guts are! <br class="br"> "Sports for a Dyspeptic Race", Intimate With Walt: Whitmans Conversataions With Horace Traubel, p. 261 https://books.google.com/books?id=_Rp_4VHeQkAC&printsec=frontcover&dq=With+Walt+Whitman+in+Camden&hl=en&sa=X&ei=dqMtVfHQLcODsAWM-ICIDQ&ved=0CEUQ6AEwBQ#v=onepage&q=base-ball&f=false <br class="br">Disputed