I'll predict he gets a call up for next Monday's or Tuesday's start. The Nats are in that 17 game stretch, and Monday will be the 11th game in that stretch. He'd be on his normal 5 day rest. Waiting 'til Tuesday would give the whole rotation 2 turns with an extra day's rest. Sunday would be Mikolas's next turn, but I think the utility of extra days rest for the rotation will have them leave him in for one more turn.