Hal Hackady, who wrote the lyrics for several Broadway musicals, as well as the theme song for the New York Mets, died Oct. 12 at Atria Riverdale, an assisted living facility in The Bronx. He was 93.

His theatrical career began in 1955 when he contributed sketches to the revue Almost Crazy, which ran a couple weeks. In the ‘70s, he was lyricist to three short-lived musicals: Minnie’s Boys, about the rise of the Marx Brothers, written with Larry Grossman, his most frequent writing companion; Ambassador, written with Don Gohman; and Goodtime Charley, again with Grossman, and starring Joel Grey. He returned to Broadway in 1987 with Teddy & Alice, a show about the relationship between President Theodore Roosevelt and his feisty daughter Alice. It ran for 77 performances.

Off-Broadway, he collaborated with Grossman on Snoopy!, a 1982 musical that drew on the "Peanuts" cartoon characters. Other credits included The Hunchback of Notre Dame (1993) and Little by Little (1999), a chamber musical about a modern love triangle.

Mr. Hackady wrote in a wide variety of fields. He penned early teleplays for "General Electric Theatre" and "Alfred Hitchcock Presents," and contributed lyrics and screenplays to teen films like "Let’s Rock," "Senior Prom," and "Hey, Let’s Twist." But the greatest number of New Yorkers encountered his work when they went to Shea Stadium to see the New York Mets play, and heard Hackady’s tune "Let’s Go Mets." The song was the brainchild of advertising executive Jerry Della Famina, and written in 1986 when the Mets captured the pennant and the World Series.

He was Born as Harold Clayton MacHackady, February 10, 1922 in Middletown, Connecticut. He later attended Wesleyan University and enrolled in a writing class at Yale, before coming to New York City in the 1950s.

In lieu of flowers, contributions should be made in Mr. Hackady’s name to The Actors Fund. Mr. Hackady leaves no survivors.