If you have not heard the news, Ryan Spaeder came out with a litany of accusations against other teams in regards to Sign Stealing / Cheating. Below are the statements that were made:
The Royals were the first team with a full analytics and video department close by their dugout, doing so in 2015, their World Series Championship year. How they used it, I do not know.
The Yankees had cameras in left, center, and right, all pointing at the pitcher’s glove, rather than the catcher, to pick up his grip .