'Smile' Actors Infiltrate MLB Games to Plug New Horror Movie - TMZ

In all of them, there was at least one person prominently positioned behind home plate that held a super creepy smile the entire time.

It was perhaps most notable during the Mets game, where a woman in a highlight green shirt (with the word SMILE written across) was standing and smiling awkwardly ...

Another guy in green was also spotted at the Dodgers game, sitting in silence and holding a creepy smile for much of the game.

Another man, this time in blue, was seen at the Yankees game ...

They are at the dodgers game too lol pic.twitter.com/VDUulR01e5.