Darryl Tapp, Kris Kocurek remember their first Oklahoma Drill experiences

Darryl Tapp, Kris Kocurek remember their first Oklahoma Drill experiences

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Michael Rothstein, ESPN Staff Writer ClosePreviously covered University of Michigan for ESPN.com and AnnArbor.com

Also covered Notre Dame for Fort Wayne Journal Gazette

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ALLEN PARK, Mich. -- Kris Kocurek can never forget it. He was a freshman in high school, lining up against the varsity. Practice started and the now-Detroit Lions defensive coach didn't know what was coming.

At tiny Caldwell High School in Caldwell, Texas, the beginning of practice meant one of the most intense things possible under Norman Cobb. The Oklahoma Drill -- all pain, all pushing to…