Clutch: A measurement of how much better or worse a player does in high leverage situations than he would have done in a context neutral environment.
Why you should care: Unlike tradition clutch statistics (close & late), Clutch is a much more comprehensive statistic taking into account all situations that may or may not have been high leverage. Additionally, instead of comparing a player to the rest of the field, it compares a player to himself. A player who hits .300 in high leverage situations when he’s an overall .300 hitter is not considered Clutch.
Links and Resources:
David Appelman is the creator of FanGraphs.