AMES, Iowa Iowa State quarterback Austen Arnaud brings his offensive to the line of scrimmage. Fans watching on television can hear him calling the cadence before the snap. Fans in the stadium support their defense by trying to drown out the quarterback's calls. This is the world above center. But there is another world of calls that fans don't hear. It is a world of rapid communication, play-calling and even intentional deception. It is the underworld of the trenches, the offensive line.

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