In 1958, one year after the
Brooklyn Dodgers and
New York Giants left for Los Angeles and San Francisco, respectively (which left the city with one major league baseball team, the
American League Yankees), Mayor
Robert Wagner of the City of New York asked Shea to chair a committee to return the National League to New York. He first tried to bring an existing franchise to New York, but the
Cincinnati Reds,
Philadelphia Phillies, and
Pittsburgh Pirates all refused his overtures. When requests for expansion were declined, Shea proposed a new league, the
Continental League, and travelled to a farm outside Philadelphia to talk
Branch Rickey out of retirement to help him. The formation of the
Continental League was announced by Rickey in 1959. The Continental League would have been a third major league and would have begun play in 1961. The threat of a third major league forced Major League Baseball to discuss expansion. Two teams would be added to the
American League in 1961: the
second incarnation of the Washington Senators — now the
Texas Rangers — and the
Los Angeles Angels (now in Anaheim), and two more to the National League in 1962 (the
New York Mets and the Houston Colt .45s (now the
Houston Astros). With New York virtually assured of one of the new teams, Shea abandoned the idea of the Continental League. The New York Mets played their first game on April 11, 1962. In 1964, the City of New York named the new stadium in which the Mets were to play in Shea's honor —
Shea Stadium. In 2008, the New York Mets retired the name "Shea" on the outfield wall of Shea Stadium alongside the other elite players and managers whom the Mets have deemed worthy of such an honor over the years (
Tom Seaver,
Mike Piazza,
Gil Hodges,
Casey Stengel, and
Jackie Robinson, retired by all teams at the request of Major League Baseball). The honor was carried over to
Citi Field, the new home of the Mets, with the other players' and managers' numbers. As of 2017, there are approximately 39 individuals who have been admitted to the Executives & Pioneers Division of the Hall of Fame. Of the 15 honored individuals admitted to the Executives & Pioneers Division of the Major League Baseball Hall of Fame post-World War II, Shea served as a friend, an advisor, a peer, and as counsel to no fewer than two-thirds thereof (
Happy Chandler;
Ford Frick;
Warren Giles;
Clark Griffith;
William Harridge;
Bowie Kuhn;
Leland MacPhail Sr.;
Leland MacPhail Jr.;
Walter O'Malley;
Alejandro Pompez;
Branch Rickey;
Bill Veeck;
George Weiss;
J. Leslie "J.L." Wilkinson;
Tom Yawkey). ==National Football League==