If you run 4.38 at your pro-day you're not a legit 4.3 guy. Combine runs always seem to be 0.02-0.04 seconds slower.
Wrong.
The conversion is hand held time vs Automatic time at combine. It is .14
So add that to his 4.37 pro day time.
They changed the setup at the combine a few years ago.
The new method is believed to eliminate the combine time being slightly slower.
Until just a few years ago, the Electronic Time was actually a hand-start, electronic finish.
- The new process is electronic start and finish.
Even with the old method, it was less than 0.04 slower than hand times on the same combine runs (on average).
There are players that have slower time at their Pro Days than at the Combine:
RB Dexter Willaims
- Combine: 4.57
- Pro Day: 4.61
Skimming through to find players that ran both this year:
CB Jordan Brown
Combine: 4.51 (unofficial combine hand held 4.46)
Pro Day: 4.50
Pro Day 0.01 faster, but 0.04 slower than combine hand held.
CB DeAndre Baker
Combine: 4.52 (unofficial combine hand held 4.50)
Pro Day: 4.51
Pro Day 0.01 faster, but 0.01 slower than combine hand held.
The biggest reason for the difference in combine & pro day times over the years f
or players that ran both is that players that ran at the combine only run again at their pro day if they are confident that they will run faster at the pro day.