Yes, I understand zone blocking and waiting for holes to develop then bursting through them. What I was getting at was someone has credited some fantastic blocking scheme on that play. That some coach called (and created) this fantastical play for the 75 yard run. I'm saying the play happened by accident, if you will. That the original play was supposed to be a zone stretch to the short side of the field (according to Iowa lore, most of the time running plays go that way after a check down is called), the defense anticipated normalcy and slanted to the short side, the left side, and after seeing the left side bottled up Canzeri cut it back to the right side and out ran every Illini that over ran the play.
A coach didn't call the fantastic result. A coach didn't scheme the exact fantastic result. CJ didn't check down to the fantastic result - the checkdown was to go to the other side of the line. It was a product of zone blocking. Canzeri was gifted and fast enough to see the opening on the other side of the line and execute the 75 yard run after most every Illini had over run the play after,IMO, anticipating the stretch run to the short side of the field.
We want the running back most capable of letting the play develop, seeing the open lanes and cutting through them. From other's reports Canzeri missed other opportunities in the Illinois game but he seems to be the best RB at this, IMO. The well executed results of zone blocking can be dramatic at times...we witnessed it.
Per my above post I went back and watched it again and I'm not so sure that it wasn't a predetermined cutback. So while unless someone actually asked one of the coaches the play call, we're all speculating but I think I'd be inclined to disagree with you.
Watch the LT and the RG - If we're running zone, the LT isn't going to step to his inside gap and stay on the double team that long. Unless it's pin and pull, the LT isn't going to block down at all. Re: the RG, a backside guard pull on an outside zone play is a very difficult block for a G to make...if it were inside zone, that's a do-able block, but Walsh's path takes him all the way to the strongside C gap, which eliminates outside zone as an option.
Watch the C and RT - If we're zoning these two guys aren't looking to work so hard to create a backside seal. They're looking to rip and climb to the second level....actually the RG would most likely have attempted to cut that 1 technique DT while the C could have almost immediately climbed to the backer.
So what you essentially have is nothing more than an influence pull from the RG. LB's keys are usually to first read the guards then the near back. As the Mike backer (lined up in a strongside 10 technique [1 technique, but at LB depth]), you see downblock/double by the G/T, near back going playside with a pulling guard coming with him, you are stepping up and filling the hole, which he did...except doing so took him way out of his run gap responsibility (playside A...he took on Walsh's block in playside C). That left the backside open because the Will, who was in a weak 30 technique, gets the double team pushed back into his lap, he loses visibility into the backfield and Canzeri runs right by him. Illinois had an extra guy in the gap because the SS came down late into run support...untouched I might add. But he was untouched because putting two guys in the playside C left playside A wide open...kudos to Canzeri for seeing it and then giving us flashbacks to his highlight tapes coming out of high school turning on the jets for 6.
So I'm torn...to me it was either a designed lead pull play and Canzeri read it nicely or the backside seal was by design and the pull was meant to do exactly what it did...flow the backers so that Canzeri could use his vision to make a play. And I think I'm leaning a little more towards the latter...
Pure speculation on my part though...