re: Inflated 40 Yard Dash Times

FAT Track times are the strictest, as the clock starts on the gun, and typically there is around a 0.24 second difference between hand times and FAT times.

The LSU camp times are 100% hand timed, and therefore the fastest times.

The NFL combine times are laser timed, but start on your first movement, and tend to be around 0.10 seconds slower than hand times. So a kid like Landon Collins who is running around a 4.4 hand timed forty will run something like a 4.52 second combine forty.

I also think kids bulk up in college, and most of them do not get faster, but rather maintain their speed (or slow down slightly) at a heavier bodyweight due to college weight rooms.

And yes, many recruits exaggerate their measureabes!