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ARLINGTON, TX - SEPTEMBER 1: Dak Prescott #4 of the Dallas Cowboys warms up on the sidelines during a preseason game against the Houston Texans at AT&T Stadium on September 1, 2016 in Arlington, Texas. The Texans defeated the Cowboys 28-17. (Photo by Wesley Hitt/Getty Images)

ARLINGTON, TX - SEPTEMBER 1:  Dak Prescott #4 of the Dallas Cowboys warms up on the sidelines during a preseason game against the Houston Texans at AT&T Stadium on September 1, 2016 in Arlington, Texas.  The Texans defeated the Cowboys 28-17.  (Photo by Wesley Hitt/Getty Images)