Manager Joe Girardi said that he is curious to see how Pettitte, who will take the mound at 7:05 p.m. ET at Trenton's Waterfront Park, bounces back after the outing.
"Now, you're starting to get some higher pitch counts and you want to see how he's bouncing back," Girardi said. "At any point, does he need an extra day in between? It's possible. It's not unusual for us to give them an extra day in Spring Training, just because they get up higher."
Girardi said the Yankees want Pettitte, 39, to get to about 95 or 100 pitches before they would seriously consider promoting him to the big leagues. That suggests Pettitte could be one or two turns away, but Girardi shied away from that notion.
"I don't really want to put a number on it because then there's an expectation," Girardi said. "When he's ready, we'll get him."