After several Major League Baseball teams reported positive coronavirus tests for players and staff members, the Yankees and Mets decided to move their preseason training from Florida, where cases have been spiking, to their home stadiums in New York, Gov. Andrew M. Cuomo announced on Saturday afternoon.
The announcement came soon after M.L.B. temporarily closed all of its spring training facilities, which are in Florida and Arizona, for deep cleanings and asked people to be tested for the virus before returning.
Five teams — the Philadelphia Phillies, the Los Angeles Angels, the San Francisco Giants, the Toronto Blue Jays and Houston Astros — have confirmed that players, other employees or people connected to them had tested positive or exhibited symptoms of Covid-19, the disease caused by the coronavirus.
M.L.B. suspended its spring training on March 12 and indefinitely postponed the start of the regular season. But as the league and its players’ union recently appeared to make progress in their protracted talks over returning to the field — with the regular season possibly starting in July — some players returned to the training facilities for limited, voluntary workouts.
The Yankees’ spring training facility is in Tampa, Fla., and the Mets’ is in Port St. Lucie.
While Florida has reported a record number of new cases three days in a row, including 4,049 on Saturday, the number of new cases in New York has tapered off since it peaked in April, with the governor reporting only 716 on Saturday.
Mr. Cuomo said Mets players would begin to train next week at Citi Field in Queens. It was unclear when the Yankees would arrive at Yankee Stadium in the Bronx, but the team confirmed that the stadium would become its preseason training site.
Unlike other sports leagues, such as the N.B.A. or M.L.S., which planned to resume play in sequestered bubbles near Orlando, M.L.B. has been aiming to play its regular season at its home stadiums.