How is the wildcat run out of the spread? I thought it was a power set.
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Wildcat - ...The general scheme can be instituted in many different offensive systems, but the distinguishing factor is a direct snap to the running back and an unbalanced offensive line. The wildcat is an offensive formation rather than an overall offensive philosophy or 'offense' (for example, a spread-option offense might use the wildcat formation to keep the defense guessing, or a West Coast offense may use the power-I formation to threaten a powerful run attack).
http://en.wikipedia.org/wiki/Wildcat_formation
Spread - ...The fundamental nature of the spread offense involves spreading the field horizontally using 3, 4, and even 5-receiver sets (some implementations of the spread also feature wide splits between the offensive linemen). The object of the spread offense is to open up multiple vertical seams for both the running and passing game to exploit, as the defense is forced to spread itself thin across the field (a "horizontal stretch") to cover everyone. There are many forms of the spread system. One of the extremes is the "Air Raid" pass-oriented version...The other extreme version is the spread option, consisting of the slot receiver and tail back as well as a speedy quarterback...Despite the multi-receiver sets, the spread option is a run-first scheme which requires a quarterback that is comfortable carrying the ball, a mobile offensive line that can pull and trap effectively, and receivers that can hold their blocks. The essence of the spread option is misdirection. Effectively, this is the old triple option except that it utilizes spread sets. In particular, the quarterback must be able to read the defensive end and determine whether he is collapsing down the line or playing upfield contain...A third version of the spread offense is the Pistol offense...Professional teams have also used various versions of this scheme beginning with the former Houston Oilers, the Atlanta Falcons, and Detroit Lions. The 2007 New England Patriots utilized the spread with quarterback Tom Brady and wide receivers Randy Moss, Wes Welker, Donte Stallworth, and Jabar Gaffney. In addition, the San Diego Chargers (1980s) and the various West Coast schemes developed by Bill Walsh and the San Francisco 49ers (1980s) stemmed their offenses, in many ways, from Ellison's and Davis' designs. In addition, a new offense known as the "spread-flex" is emerging among many programs. This offense combines the flex-bone and the spread offense together in order to cause confusion for defenses and to take advantage of mismatches. This dynamic offense has worked its way up into the smaller colleges and universities such as Air Force who use it very effectively. It can be effective in many ways to spread the ball out to the wide receivers as well as using a lot of pre-snap shifting and motion to run the option zone read plays. Imagine combining the offenses of Navy (a heavily run-oriented option offense that has led the NCAA in rushing in every season since 2003) and Texas Tech (one of the most pass-oriented college offenses) and you have the "spread-flex". The 2008 Miami Dolphins are the most recent team to implement some form of the spread offense in their offensive schemes. Lining up in the "wildcat" formation, the Miami Dolphins, borrowing from Gus Malzahn's college spread offense, “direct snap” the ball to their running back, Ronnie Brown.[5] Brown is then able to read the defense, and either pass or keep the ball himself. Thus far, defenses have had difficulty stopping this new-look Miami offense—an offense which stunned the New England Patriots at New England and the San Diego Chargers at Miami during the 2008 season, although some teams were able to adapt.
http://en.wikipedia.org/wiki/Spread_offense
Sorry to make this such a lengthy response, but I wanted to try to clear up misconceptions, as I see them, about the Spread and Wildcat. I think this will probably answer the question by itself. There are further examples though. I say the Spread is a concept because, as this points out, it's just an idea based on spreading out the field. It's not a play, a set of plays, or a set of formations. It's an approach. I think it's clear that Nebraska has been running the spread since about our 4th game in 2008. In 2008 we'd air it out because that's what our personell was suited for, but in 2009 we transitioned to running out of it, and eventually running the Wildcat out of it because that's what our personell dictated.
The Wildcat is basically just the idea of lining some other skill position player up at qb and trying to mask the formation to make it look like all the other formations. Teams make substitutions and play calls based on who's in the huddle. If the qb is still in there, they'll think there's nothing strange going on. Then when you line up, they can make changes, but they have to be quick. Teams like the Broncos last year added more complexity to this by lining Orton up at WR and sometimes motioning him back in at qb. This means that a team can't know what will be run until it's run. This makes for huge mismatches. Although, the Wildcat originated from the Wing-T, it can be run out of anything.
If I didn't explain something very well, or something still needs to be cleared up, please don't hesitate to let me know. I know these are only wikipedia links, but I have no doubt they'll do for the atmosphere of a message board. I understand that I might not explain this that well. To me it's clear, and it was before I read the wikipedia pages, but I didn't grow up before the Spread so, in some ways, I benefited from that because it was easier to make the connections. It's similar to the situation people face that grew up before computers came into their own. It's often hard for them to adapt and understand. I'm sure when I turn grey, I'll face many more problems than I can't even comprehend. This is kind of a reflection, though, and isn't really necesarry for explaining the question. I just didn't want to come off sounding condescending or anything like that. It's just that I hear these terms used in the wrong way pretty frequently, and I'm just trying to clear up any misconceptons.