Turns out the man who gave the Yankees a thumbs-down at Citi Field is actually a Mets fan
NY Mets thumbs down salute is to booing fans, says Javier Baez
Thumbs Down Guy: Famous Mets fan seeks help after nearly dying
Things Are Looking Up for the Yankees' Thumbs Down Guy - The New York Times
4 NY Mets trades for a deadline rental that were an overpayment
Mets players let booing fans 'know how it feels' with thumbs down celebration; team says it's 'unacceptable'
Javier Báez, Francisco Lindor apologize for thumbs-down jab at Mets fans - The Boston Globe
Javier Baez gives Mets fans thumbs down for team getting booed - Sports Illustrated
Boo Who? Báez Says Mets Flashing Thumbs Down To Fickle Fans - CBS New York
Mets owner Steve Cohen on thumbs down: 'It is unacceptable
Of Course Thumbs Down Guy Is A Mets Fan
Chicago Cubs: Javier Baez gives a thumbs down to Mets fans
Baez and Lindor apologise after giving Mets fans thumbs down