GUIDE TO THE 20 YARD SHUTTLE RUN

The drills at the NFL combine boil down to two questions: Do the measurables mesh with the film? And which players triggered red flags with their results? From the 40 to the bench press, here are the numbers to know for each drill.

Best: 3.73 seconds, WR Kevin Kasper, 2001

THE 20 YARD SHUTTLE RUN

Why it matters: It's not a coincidence that most of the positions listed below are on defense. Being an NFL defender is all about reaction: How quickly can you diagnose a play, come to a stop and explode toward the ball? And the 20-yard shuttle showcases a player's body control as he is changing directions.

Past standout: Panthers LB Luke Kuechly The 4.11-second 20-yard shuttle Kuechly posted in 2012 is just outside the outstanding range above for inside linebackers (4.07 and below). That kind of short-area quickness, in combination with Kuechly's outstanding recognition skills, helped turn him into a five-time All Pro before he retired. Next stop ... Hall of Fame?