Excellent breakdown, thanks MrEd.
Its nice to see some stats because I'm tired of hearing how Martin played well at LT and how Jerry is better than Incognito. The fact of the matter is that while Martin possesses the potential to be a good T, he simply wasn't a good enough pass protector to play LT as of last season. In 10 of 16 games last season Martin was scored as bad or worse in pass protection. That's not being outclassed athletically though, he has that and the frame to grow ... with him it's all strength. I've crossed all my fingers and toes that he gains the power needed and gets accustomed to RT in the offseason and is ready to make huge strides in 2013.
Jerry scored bad or worse in the run game 11 of 16 games. Honestly, this should be Jerry's forte, and I hope it will be when/if he gets up to speed with the zone block scheme. But, he's disappointed every season with his production and every offseason with his preparation, so I'm not expecting this leopard to change his spots in 2013. IMHO, this is the guy we need to replace first. I was a little surprised to see his pass protection graded bad or below only 5 of 16 times though ... as his pass blocking appeared poor to me far more often than every third game.
The encouraging part about Long was that his run blocking scored strong (good or great in 7 of 8 games after week four), and his pass protection scored good or great in 9 of 12 games. That's not quite as horrible as this board would have you believe. Considering his injury issues and switching to the ZBS, that's impressive. Hopefully people can see why Mike Pouncey is lobbying so hard to keep Jake Long. No, he's not truly elite like he was his first few seasons, but he's still a good LT and those are hard to find. To me, the biggest negative isn't scored though, and that's the fact he missed 4 of 16 games from injury, and he has been missing games to injury a lot in recent years.
So all in all, it looks like Pouncey is a stud, Long is a stud when healthy, and Incognito has adapted to the ZBS better and faster than anybody expected. Unfortunately, Jonathan Martin took his lumps as a rookie, but hopefully this experience helped him learn what he needs to work on in the offseason. Jerry remains a project.