Without any contact, the majority of the position drills do very little to improve or reduce current draft projections. The NFL uses the combine to corroborate or trigger further evaluation for players. In my opinion, the most important part of the process (for the OL) is the interview, medical, and physical measurements. I've compiled the list of arm length measurements from the 2013 draft to help guide your evaluation of OL in this year's combine.

Offensive Tackles

These are compiled arm length results for OT taken in the 2013 draft. You can see in this limited sample that the Offensive Tackle drafted in round 1-3 have a 34"+ arm length, on average.

1st Round OT 34.6 32 36.75
2nd & 3rd Round OT 34 34 34
4th & 5th Round OT 33.77 33.375 34
6th & 7th Round OT 33.5 32.625 34.375

Offensive Guards

The Offensive Guards have shorter arm lengths than the Tackles, but arm lengths are still very important. When the talent decreases below the 3rd round, NFL teams default to guards with longer arms.

1st Round OG 33.7 33 34.75
2nd & 3rd Round OG 33.4 32.75 34.125
4th & 5th Round OG 34.33 34 34.875
6th & 7th Round OG 34 32.25 35.5


The Center position clearly has less to do with arm length than it has to do with athleticism.
1st Round C 33 33 33
2nd & 3rd Round C N/A N/A N/A
4th & 5th Round C 33.5 32 35
6th & 7th Round C 33.5 33.5 33.5