Yankees announce Gary Sanchez, 1-for-21 this spring, optioned to Triple-A Scranton/Wilkes-Barre and reassigned to minor league camp— Erik Boland (@eboland11) March 24, 2016
I'm not surprised at this tweet from Mr. Boland, as I've expected the Yankees to send Sanchez to AAA for some time now. Not because he can't cut it in the Majors, but because it makes sense to hold onto as many options as possible until your forced to do differently.
As for the other two catchers vying for the backup role behind Brian McCann, there's Austin Romine and Carlos Corporan. It's possible that only one of those two will be with the Yankees come Opening Day, as Romine is out of options and Corporan can opt-out of his contract at the end of Spring Training.
Therefore, if Sanchez won the backup role, the Yankees could have very well lost two... not just one... catching option. It's possible Corporan would accept a minor league position, seeing as how nobody seemed willing to give him a Major League contract this offseason. But why risk it?
My guess is the Yankees take Austin Romine to New York, and let Carlos Corporan decide whether to take the backup role in Scranton or try another team. This way the Yankees could keep all three catchers in the organization. However, I think Corporan will opt-out and at least try to find a starting AAA gig elsewhere.