Is there a rule against Michigan running screens?

[The_Root]

Help me out here. How can you run a pro offense but not have at least one of these in your arsenal? Every team just loads the box and crashes the middle. Why not have just one RB screen? TE screen?

 

[cfl74]

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[The_Root]

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[CtBlue03]

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[BK In No Cal]

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[martyk]

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