First of all, no manager in baseball is managing Sunday's pen on a Friday night in the middle innings of a two run game.
Secondly, I'd guess only Alcala and Sands are off limits Sunday. And HAD Staumont thrown an inning Friday night, that's not necessarily reason to think he can't pitch again Sunday. Believe it or not, MLB relievers have, on occasion, thrown on 2 out of 3 days.
Which is an example of why nobody is managing Sunday's bullpen on a Friday night.