First, I didn't say offensive AND defensive linemen. I said offensive linemen. I also never said that linemen aren't among the most injured types of players, so pull back the assumptions.

SB nation on NFL teams' IR's: http://www.thefalcoholic.com/2010/7/7/1467728/which-nfl-position-groups-suffer

From January 3rd: http://www.cbssports.com/nfl/injuries

• According to this, in the NFL, there are currently 167 OFFENSIVE linemen that are injured or are probably based on some sort of injury. That is a staggering number. Almost all of them are lower body injuries. That's expected because of all the leg tangling that goes on in the trenches. 11 of those injuries are concussions.

• According to the count on January 3rd by CBS, 82 players in the NFL are currently diagnosed with concussions, and 11 are offensive linemen. That is all offensive linemen total, and remember there are more offensive linemen on the field in the NFL than any other position a large majority of the time (the exception is dime and quarter defenses). So 5 out of 22 positions (a little under 1/4 of players on the field) account for just 13% of all concussions in the NFL. Again, these are five players on the field at once (five positions), not just one position.

• Now, as a coach, they are NOT running head first into each other. No properly coached offensive lineman would let that happen. Does it happen? Of course it does, but not the way you put it. Any average coached linemen will be engaging defenders with their hands and shoulders first. Will there be helmet to helmet contact? Most likely, but it's not the point of the charge or movement. It's just like how people freak out when they see a scrum in rugby thinking the players are colliding head first. That's not the case. The heads are taught to be kept down so all contact occurs at the shoulders.

Check out this link by CBS: http://denver.cbslocal.com/2014/01/12/which-position-suffers-the-most-concussions/

• Concussions: Look who has the most, look who has the least. The highest by far are the ones who get the largest running start before contacts: Safeties and cornerbacks, followed by receivers and tight ends, while ALL linemen and QB's make up the much smaller portion of concussions.

Another source reinforcing that it's DB's and receives that suffer the most concussions: http://www.pbs.org/wgbh/frontline/article/what-weve-learned-from-two-years-of-tracking-nfl-concussions/

Here's a scientific research experiment and results on concussions in the NFL: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3438866/

• Table 5: of the five activities listed as for reasons that led to concussions, blocking was in the middle of the three, whereas tackling and being tackled both are significantly larger percentages for the reasons players get concussed.

I think it is safe to say that offensive linemen do not suffer a very high portion of concussions compared to other positions, and it is clear that skill positions suffer concussions and a much higher rate.