I had never heard of Marquardt until today. I watched the video Rob linked, and to say the least, I was very impressed:
Yes, this is a highlight video, and it's a highlight video of him playing against scrubs. But at (allegedly) 6'9" and 317 pounds, you can see him utterly dominate the competition in the run game in a way I haven't seen since Nate Solder, who was also around the same height and size. Given how much he outclasses his competition in terms of physical gifts, you'd be understanding if he coasted by. Instead, he plays with a nasty streak you don't usually see from lineman so large.
Had I not been having terrible internet problems recently, I probably would have heard of Marquardt a few days ago when Tony Pauline mentioned Marquardt in his week of April 8th draft update. It appears I'm not the first person to see Nate Solder in Marquardt's game:
But out west I am told almost 20 teams/position coaches will attend the workout of Azusa Pacific offensive tackle Luke Marquardt. There’s a lot to be learned as Marquadt missed all of last season with a foot injury and did not workout at the combine. He’s being compared to both Sebastian Vollmer and Nate Solder.
I was told coaches on hand drooled over the display of size, athleticism and the way Marquardt effortlessly moved his 317-pound frame around the field...
...Where will Marquardt be selected in the draft? Its not out of the question that a team with double digit picks rolls the dice in round three hoping to hit on Marquardt’s awesome potential.
Anyway, he's fits both Seattle and Cables criteria perfectly, he should be available in the rounds 3-5 range, and he's drawing comparisons to Nate Solder, who Seattle rated extremely high before the 2011 draft. Definitely a player to keep an eye on.