An unexpected question the Yankees will need to ask themselves ahead of the trade deadline: Is Angel Chivilli for real?

Unfathomable just three weeks ago, the young, hard-throwing right-hander is beginning to work himself into Aaron Boone’s circle of trust at a time Brian Cashman & Co. are looking for high-end relievers they can trust.

The nightcap Wednesday in The Bronx may have offered a hint.

Granted, Boone had fewer options than usual after burning Brent Headrick, David Bednar and Fernando Cruz hours earlier, but in a scoreless game in the sixth inning with three Pirates righties due up, Boone did not call for a rested (and struggling) Camilo Doval.