When spring training opens on Wednesday, it’s going to be crowded at Yankee Stadium and Citi Field, and minor league facilities could see some unexpected action, including Brooklyn.

Members of the Yankees’ 40-man roster and approximately 20 additional players on the “taxi squad’’ will spend the first half of Spring Training 2 working out in The Bronx. After that the taxi squad will be sent to PNC Field in Moosic, Pa., which is the regular-season home of the Scranton/Wilkes-Barre RailRiders, the Yankees’ Triple-A team.

Mets officials have discussed the possibility of utilizing MCU Park in Brooklyn — home of their Class-A affiliate — as an overflow site for workouts, according to industry sources. Citi Field will become the Mets’ primary workout site, after teams last week vacated their Florida ballparks due to a surge in coronavirus cases. One source said MCU Park was “on the table,” as a possible workout locale, but nothing has been finalized.

The initial plan was for Spring Training 2 to take place at Florida and Arizona locations. However, positive tests for coronavirus have spiked in those areas.

MLB ordered spring training facilities locked last week after the Phillies and Yankees were among big-league teams to have members of their organizations test positive.

“It’s all going to be new for us,” a Mets player told The Post. “I don’t even know what to expect.”