Great players are measured by straight stats. Whichever receiver gained the most yards against the toughest competition is the best.
Clutch performers are different. They are measured in other ways. A clutch player can be good for three quarters but explosively great in the fourth.
He could also be exceptional at converting third downs. Maybe that player needs a little pressure to perform because first and second downs aren't challenging enough already.
He could also be consistent. As in, this player could average 3.5 yards per carry, but he gets at least three yards every time. If that's true, and you need three yards, he's your clutch performer.
Sometimes they are tortoises and sometimes they are hares. Either way, consistent, explosive and specialty players have a list on which they belong.
Here is the predicted top clutch performer for every FBS team, from Air Force to Wyoming.