Washington Redskins quarterback Case Keenum looks downfield to pass the ball in the first half of an NFL football game against the Dallas Cowboys, Sunday, Sept. 15, 2019, in Landover, Md. (AP Photo/Evan Vucci)

Dallas Cowboys quarterback Dak Prescott looks downfield to pass the ball in the first half of an NFL football game against the Washington Redskins, Sunday, Sept. 15, 2019, in Landover, Md. (AP Photo/Alex Brandon)

Dallas Cowboys quarterback Dak Prescott (4) looks downfield to pass the ball in the first half of an NFL football game against the Washington Redskins, Sunday, Sept. 15, 2019, in Landover, Md. (AP Photo/Alex Brandon)

Members of the Washington Redskins take the field before the start of the first half of an NFL football game against Dallas Cowboys, Sunday, Sept. 15, 2019, in Landover, Md. (AP Photo/Alex Brandon)

Dallas Cowboys wide receiver Randall Cobb (18) is stopped by Washington Redskins strong safety Landon Collins (20) and inside linebacker Jon Bostic (53) in the first half of an NFL football game, Sunday, Sept. 15, 2019, in Landover, Md. (AP Photo/Alex Brandon)

Washington Redskins running back Adrian Peterson (26) scores a touchdown against the Dallas Cowboys in the first half of an NFL football game, Sunday, Sept. 15, 2019, in Landover, Md. (AP Photo/Alex Brandon)

Washington Redskins running back Adrian Peterson (26) begins to celebrate his touchdown against the Dallas Cowboys with his teammates in the first half of an NFL football game, Sunday, Sept. 15, 2019, in Landover, Md. (AP Photo/Alex Brandon)

Washington Redskins running back Adrian Peterson (26) celebrates his touchdown against the Dallas Cowboys with his teammates in the first half of an NFL football game, Sunday, Sept. 15, 2019, in Landover, Md. (AP Photo/Alex Brandon)

Washington Redskins quarterback Case Keenum celebrates touchdown run by teammate running back Adrian Peterson against the Dallas Cowboys in the first half of an NFL football game, Sunday, Sept. 15, 2019, in Landover, Md. (AP Photo/Mark Tenally)

Dallas Cowboys wide receiver Devin Smith celebrates his touchdown against Washington Redskins cornerback Josh Norman (24) in the first half of an NFL football game Sunday, Sept. 15, 2019, in Landover, Md. (AP Photo/Evan Vucci)

Dallas Cowboys wide receiver Devin Smith makes a catch and goes on to score against Washington Redskins cornerback Josh Norman (24) in the first half of an NFL football game, Sunday, Sept. 15, 2019, in Landover, Md. (AP Photo/Evan Vucci)

Dallas Cowboys wide receiver Devin Smith reaches out to make a catch and score against Washington Redskins cornerback Josh Norman (24) in the first half of an NFL football game, Sunday, Sept. 15, 2019, in Landover, Md. (AP Photo/Evan Vucci)