Terron Armstead ran a 4.65 40 yard dash at the 2013 combine.
5.2 4o yard dash
he ran a 4.21 in his forty yard dash in Miami
No, this is one of the ways to get called for defensive holding. 5 yard penalty, replay the down.
slow. most pro lineman are under 5 seconds.
As a 100 yard dash sprinter in the 60's the average time would be about 10.2 to 10.3.
It is average.
The average 40 yard dash speed for an CB in the NFL is 4.25 to 4.45
40 yard dash/10 yard dash= 4 What ever the time you got for the ten yard, you multiple it by 4. It could be an average of your running time per 10 yard dash. Sometimes for several runners, they would feel worn out by the time when reaching the 40 yard mark.