100 pitches is a lot but not in perspective of it being the 9th inning. It was an absolute masterpiece he was throwing. I'd let him have the opportunity at closing the game out because he deserved it and his pitch count wasn't that absurd. There was also "issues" with that closer days or games prior to the opener.

If he got into trouble and a few got on base...then I would have pulled him quickly.

I’m armed and I’m drinking. You don’t want to listen to advice from me, amigo.

-Max Payne