clutch quotient

The degree of measure to which someone came through in a moment of need, crisis, or difficulty. Can also be used in a sports context to acknowledge a moment where a player put on a game-winning performance when the team really needed him or her.

Brandi Chastain hitting that penalty shot against China was like a clutch quotient of 10.

Uh-oh, Rex Grossman just threw another interception. His clutch quotient is definitely in single digits.