In a tongue-in-cheek analysis in The Times in 1963, Leonard Koppett wrote: “There is little in the score of interest to a mid-20th-century audience. The harmony is traditional; no influences of atonality or polytonality can be found. In fact, it’s sort of un-tonal.”

Certainly the upbeat, sing-songy melody of “Meet the Mets” is not complex. Neither are the words, which originally began “Meet the Mets, meet the Mets,/Step right up and greet the Mets,” and included the claim — optimistic in the Mets’ early days, when they were the worst team in baseball, and unrealistic now that they play in the cavernous Citi Field — that “the Mets are really sockin’ the ball,/Knockin’ those home runs over the wall.”

The lyrics were largely rewritten in 1984 (Ms. Roberts and Mr. Katz were not involved in the rewrite). The reference to home runs was removed, as were the arguably sexist words that preceded it: “Bring your kiddies, bring your wife/Guaranteed to have the time of your life.” But the insistently high-spirited tune remained virtually unchanged, and it continues to be heard regularly on radio, on television and at all of the Mets’ home games.

Image “Meet the Mets,” written with her collaborator Bill Katz, is featured at the Mets Hall of Fame in Citi Field. Credit... Swoan Parker for The New York Times

“Meet the Mets” was not the first sports-themed song by Ms. Roberts and Mr. Katz. Their previous collaborations included “Mr. Touchdown, U.S.A.,” recorded by Hugo Winterhalter’s orchestra in 1951; “I Love Mickey,” recorded by Teresa Brewer and Mickey Mantle in 1956 (Ms. Brewer did almost all the singing, with Mantle occasionally interjecting “Mickey who?”); and “It’s a Beautiful Day for a Ballgame,” which was played for many years at Los Angeles Dodgers home games.