I’m just going to defer to ‘Hacks on this one.
The Diamondbacks were 1-3, visiting Coors, and the pitching is already depleted. They call up Peacock from AA on April 6, and that very night it goes extra in Coors. His first major league appearance wasn’t in regulation, like Tyler Gilbert’s first three mlb relief appearances were, or the third inning as a long man in a blow out. It was the eleventh inning, with Manfred Man on second base. If Peacock gives up an earned run, in Coors Field, we lose.
He doesn’t.
He pitches a hitless eleventh.