The Yankees' thumbs-down celebration has a hilarious backstory

New York Yankees: Todd Frazier Trolls Rays Fan With Celebration (Video)

Mets awarded 1-0 win over Marlins for suspended game, with 9th inning wiped out because of rain, National Sports

For those wondering, here's the deal with the 'Thumbs Down' Yankees celebration

Yanks give Judge, Frazier thumbs down in 13-5 rout Orioles

Tyreek Hill captivates social media with hilarious TD celebration

Mariners pay tribute to Bay Area's Smash Mouth, show Athletics finger and thumb in the shape of an L on their forehead - Lookout Landing

An Oral History of Watching (and Not Watching) the Last Three Innings of That Crazy Astros Game – Texas Monthly

The Astros and the long history of sign-stealing in baseball - Royals Review

Twins closer Jhoan Duran gets finger repaired, then mows down Blue Jays to end series