Cole will still be a really good pitcher going forward, but will he be less elite? Will he still be worth 300+ million? To be sure, the Yankees signed Cole to win a game like Sunday's loss to the Red Sox.
It seems like some pitchers abused the rules more than others. Some pitchers didn't bother with sticky stuff and some did. In the case of Cole, not only did he use sticky stuff, but he used it in excess, and will likely be more pedestrian without it. That's a problem, though, because the Yankees are paying him over 300 million.
This is a little reminiscent of Jason Giambi's situation from years ago. The Yankees signed him to a lucrative contract only to learn later that his stats were inflated due to steroids, and that without steroids he wouldn't be as great.
Richards is a sticky stuff guy too, but at least the Red Sox can get out of the contract at the end of the season.