Marshawn Lynch better get at least 4 yards per carry, or else he is going to be on a trade block.

Even average RBs are expected to average around 4 YPC.

If God needs any more help answering football questions, he can ask me.

Technically the Legion of Boom is the defensive secondary.

Also, I'm guessing as many traumatic brain injuries are suffered by offensive players (especially wide receivers) as defensive players, and that offensive linemen are among the least susceptible to TBIs.

Slight correction: all NFL players (except kickers) are likely to have chronic traumatic encephalopathy, not just linemen. Linemen have it worst, taking 50-60 brain-damaging hits every game and every practice, but other players get hit too. Tony Dorsett probably has it, and he's a running back; Jim McMahon was a QB.

When you watch a football game, you're watching young men die for your pleasure. Former NFL and CFL players have life expectancies in the 50s, 20-odd years shorter than normal people.

When it comes to lineman it is kind of a crapshoot. When pass-blocking, there is a very low chance for any serious contact with the head due to the mechanics involved, and certain positions block differently based on scheme and style. If you are a lineman, it is about getting your hands on a guy and shoving him in a certain direction, not smashing into him at full-blast.

That is what RBs, WRs, LBs, and DBs do. Defenders who practice poor tackling form by lowering the head and using it as a battering ram will suffer a lot of head injuries over their careers.

However, lineman experience contact in every single play, and so that can skew the odds, so to speak.

It's a crapshoot, which is why the NFL concussion protocols have gotten so specific. I fully expect the sad trend of the drastically shortened lives of NFL players #3 cites to begin a slow regression as concussed players are no longer allowed right back on the field.

God really isn't as up on the nuances as football as I though He would be. He made several errors that would be understandable for a casual fan, but are worrying from the all-knowing omnipresent creator of the universe.

@5: God really only watches for the tight pants.

The correct answer to the first question is if you don't know anything about football, don't try to sound like you do. You won't.

Came to say what @3 said: Quarterbacks, running backs, wide receivers -- every position is vulnerable.

Those interested should read "League of Denial." It's enough to make you question your love of football.