It's not that he won't find it...its about speeding it up. What if he takes a month to find it...that hurts the offense. Maybe waking him up by batting him 6th one game is all it would take. Just a different approach then wait and see.
Sanchez really only has 2 pitches right now....if I was calling the game it would still look the same. With Sanchez's movement it would be better to have someone who can frame in my opinion.