"I don't know whether the cupboard is bare, they're all playing defense or what. It just seems like you get talented players, but you end up not having as many around that really know what they're doing," Denver offensive coordinator Rick Dennison said.
Ravens coach John Harbaugh, however, said Gruden has "a valid point. It's definitely something that we have to contend with all across the league."
"We've got a guy here from a spread offense and I'm pretty impressed with him."
"You're getting a lot young offensive linemen out of college these days that have never been in a three-point stance, have never been in a huddle. They don't have a real good background in how to get (in) the stance and get out of a stance and pass protect let alone pick up stunts, blitzes, handle audibles," Gruden said.
Broncos defensive lineman Antonio Smith said that regardless of whether they come out of schools that run pro style or spread offenses, "usually rookie offensive linemen are easy to beat."
"And I'm not faulting anybody. They've got to do what they think they've got to do best to win, right?
"Obviously, they did very well wherever they were at or otherwise they wouldn't be here. They did whatever was told of them very, very well by their coaches,
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That would be rookie right tackle Jeremiah Poutasi, a third-round pick from Utah who went from a power, three-point stance as a freshman to a two-point stance his sophomore year.
"As soon as I got here, I put my hand back on the ground,
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Zack Martin, the first rookie All-Pro for Dallas since running back Calvin Hill in 1969, played in the spread offense at Notre Dame but said his biggest adjustment wasn't the style of play but the competition.
Vikings second-year center Zac Kerin had to adapt not only to the higher level of competition and playbook complexity but also the simple proximity of his quarterback.
Pro Bowl guard Evan Mathis, who left behind an O-line in Philadelphia that's struggling without him for one in Denver that's struggling with him, gave an impassioned defense of rookie linemen,
Cheap Jerseys Free, saying "some guys can learn that stuff in no time."
College football's spread offenses are producing wide receivers and quarterbacks ready to play as NFL rookies