It was originally to be called "Flushing Meadow Park Municipal Stadium" – the name of the public park within which it was built – but an ultimately successful movement was launched to name it in honor of William Shea, the New York attorney who brought National League baseball back to New York. 

2005 aerial view of William A. Shea Municipal Stadium, usually shortened to Shea Stadium, located in Flushing, Queens, New York City. In the foreground the IRT Flushing Line of the New York City Subways can be seen with the Willets Point–Shea Stadium station in the middle. The wide footwalk leads to Flushing Meadows Park, the previous location of the 1964 World's Fair grounds. At the lower left corner there is the LIRR Corona Yard facility. The long inspection shed was torn down in August 2006. Photo: Wiki - Geographer

R36 World's Fair Cars delivered by St. Louis Car Co. 1964 for IRT Flushing Line no.7 service. Newly constructed Shea Stadium behind the Shea Stadium station stop.

SHEA STADIUM: PREVIOUSLY “WORLD’S FAIR” STATION OF 1964-65 NY WORLD’S FAIR - FLUSHING MEADOWS - 1964. RENAMED “SHEA STADIUM”: 4/15/66. NO FULL-TIME AGENCY. AGENCY ONLY OPEN DURING EVENTS PER LIRR "TICKET OFFICE HOURS" LISTING OF 5/31/66 (Brad Phillips data). FLASHING YELLOW LIGHT MOUNTED ON SIGNAL MASTS TO INDICATE STOP TO BE MADE, IN SVC: 3/21/88. OUT OF SERVICE: END OF BASEBALL SEASON: 9/29/2008. SHEA STADIUM TORN DOWN AND REPLACED WITH NEW “CITI FIELD” STADIUM AND STATION STOP RENAMED “METS-WILLETS POINT.” IN SERVICE:  TIMETABLE EFFECTIVE 4/3/2009. Research: Dave Keller

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Mets Special train #2038 SETAUKET observation car and #2037 TUSCARORA CLUB, just west of Babylon, enroute to a ceremony/rally at Babylon Station. Mets players were among the dignitaries. 6/1966 Photo: Everett White  Archive: Bill Mangahas

Banner reads: MEET THE Mets TODAY ... TRAVELIN' EASY FROM SHEA

Rheingold Beer coaster - NY Mets 1969 World Series Champions 

There were other Mets Specials, also. After the 1969 Championship, one Special was operated on the mainline. It had a flatcar between at least two Parlors. Special Service Attendants were handing out White Rock sodas to the crowd, and Second Baseman Wayne Garrett spoke on the flat car.
 

Mets-Yankees LIRR "Bullpen" Special 8/24/1972
Archive: Dave Morrison

Hempstead Station - NY Mets Ad 8/1982
Photo/Archive: Jay Bendersky

Springtime, and baseball season, cannot be too far away... In August of 1982, the Mets were beginning to make the moves that would culminate in their 1986 World Series victory. This advertisement, at Hempstead station, touts 3 Mets sluggers: Dave Kingman, George Foster and Ellis Valentine. Ironically, none would become part of the Mets 1986 World Series team, with Foster staying the longest, but being released by the team in August of 1986, a few months before the World Series. Jay Bendersky