Although the Jets lost two fumbles, and Sanchez missed four plays in the third quarter after injuring his left leg, his mistakes were minimal as he employed a newly implemented code system designed to remind him of the level of care he should take when throwing the ball.
Sanchez said the code was too complicated for him to explain. Ryan, however, said it was merely a three-tiered framework, communicated by words and colors to Sanchez before each possession and each passing play by Ryan and the offensive coordinator Brian Schottenheimer.
Sanchez Limits Risk; Color Jets Impressed - NYT 11/30
I don't know, maybe this happens with every team. I never read up, for instance, on Yankees prospects as closely, but maybe Jorge Posada had to tell Joba Chamberlain to stop shouting his pitches into a megaphone before throwing them. I somehow doubt it though.