“They do a lot of high-lowing,” Narduzzi said. “It’s dangerous football, I can tell you that. You watch inside, if you watch our nose tackle, there’s times when a center is kind of hitting him up high and there’s a guy coming in from the other side, which is really illegal, but they never call it. I don’t quite understand how that happens.”
Narduzzi was describing a chop block, an illegal maneuver in which two players simultaneously block one opposing player, one at thigh level or lower and the other above it. It is not to be confused with a cut block, in which a player blocks a defender below the waist. It is a legal block with certain limitations on where and when it can be thrown.