Images from the Sideline: Broncos 42, Cowboys 17

Denver QB Trevor Siemian tied a career high with four touchdown passes while the Broncos D handed Dallas RB Ezekiel Elliott the worst game of his career -- last year's league-leading rusher totaled only 8 yards on 9 carries Sunday.

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DENVER, CO - SEPTEMBER 17: Denver Broncos cheerleaders perform during a game between the Denver Broncos and the Dallas Cowboys at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Justin Edmonds/Getty Images)
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DENVER, CO - SEPTEMBER 17: Denver Broncos cheerleaders perform during a game between the Denver Broncos and the Dallas Cowboys at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Justin Edmonds/Getty Images)
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DENVER, CO - SEPTEMBER 17: Head coach Jason Garrett of the Dallas Cowboys reacts to a play in the second half of a game against the Denver Broncos at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Dustin Bradford/Getty Images)
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DENVER, CO - SEPTEMBER 17: Quarterback Trevor Siemian #13 of the Denver Broncos is sacked by defensive end Demarcus Lawrence #90 of the Dallas Cowboys forcing a fumble and turnover in the second quarter of a game at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Dustin Bradford/Getty Images)
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DENVER, CO - SEPTEMBER 17: Head coach Vance Joseph of the Denver Broncos looks on during the national anthem before a game against the Dallas Cowboys at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Justin Edmonds/Getty Images)
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DENVER, CO - SEPTEMBER 17: Strong safety Justin Simmons #31 of the Denver Broncos runs onto the field during player introductions before a game against the Dallas Cowboys at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Justin Edmonds/Getty Images)
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DENVER, CO - SEPTEMBER 17: Quarterback Trevor Siemian #13 of the Denver Broncos looks on during the national anthem before a game against the Dallas Cowboys at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Justin Edmonds/Getty Images)
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DENVER, CO - SEPTEMBER 17: Running back C.J. Anderson #22 of the Denver Broncos escapes from a group of Dallas Cowboys defenders in the first half of a game at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Justin Edmonds/Getty Images)
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DENVER, CO - SEPTEMBER 17: Wide receiver Dez Bryant #88 of the Dallas Cowboys has a 3 yard touchdown reception in the second quarter of a game against the Denver Broncos at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Justin Edmonds/Getty Images)
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DENVER, CO - SEPTEMBER 17: Wide receiver Dez Bryant #88 of the Dallas Cowboys celebrates after a 3 yard touchdown reception in the second quarter of a game against the Denver Broncos at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Justin Edmonds/Getty Images)
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DENVER, CO - SEPTEMBER 17: Quarterback Dak Prescott #4 of the Dallas Cowboys celebrates with Jason Witten after throwing for a second quarter touchdown at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Matthew Stockman/Getty Images)
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DENVER, CO - SEPTEMBER 17: Quarterback Trevor Siemian #13 of the Denver Broncos keeps the ball and is chased by strong safety Kavon Frazier #35 of the Dallas Cowboys in the second quarter of a game at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Dustin Bradford/Getty Images)
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DENVER, CO - SEPTEMBER 17: Wide receiver Demaryius Thomas #88 of the Denver Broncos celebrates after a first down catch in the second quarter of a game against the Dallas Cowboys at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Justin Edmonds/Getty Images)
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DENVER, CO - SEPTEMBER 17: Quarterback Dak Prescott #4 of the Dallas Cowboys passes against the Denver Broncos int he second quarter of a game at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Justin Edmonds/Getty Images)
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DENVER, CO - SEPTEMBER 17: Tight end Virgil Green #85 of the Denver Broncos runs into the end zone with a third quarter touchdown against the Dallas Cowboys at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Dustin Bradford/Getty Images)
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DENVER, CO - SEPTEMBER 17: Tight end Virgil Green #85 of the Denver Broncos runs into the end zone with a third quarter touchdown against the Dallas Cowboys at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Dustin Bradford/Getty Images)
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DENVER, CO - SEPTEMBER 17: Running back C.J. Anderson #22 of the Denver Broncos rushes past strong safety Jeff Heath #38 of the Dallas Cowboys for a third quarter touchdown at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Justin Edmonds/Getty Images)
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DENVER, CO - SEPTEMBER 17: Running back C.J. Anderson #22 of the Denver Broncos celebrates a third quarter touchdown with teammates during a game against the Dallas Cowboys at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Justin Edmonds/Getty Images)
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DENVER, CO - SEPTEMBER 17: Cornerback Bradley Roby #29 of the Denver Broncos breaks up a pass intended for wide receiver Dez Bryant #88 of the Dallas Cowboys in the end zone in the fourth quarter of a game at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Justin Edmonds/Getty Images)
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DENVER, CO - SEPTEMBER 17: Quarterback Dak Prescott #4 of the Dallas Cowboys rushes under pressure by outside linebacker Von Miller #58 of the Denver Broncos in the fourth quarter of a game at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Justin Edmonds/Getty Images)
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DENVER, CO - SEPTEMBER 17: Running back Ezekiel Elliott #21 of the Dallas Cowboys rushes against the Denver Broncos in the second half of a game at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Justin Edmonds/Getty Images)
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DENVER, CO - SEPTEMBER 17: Quarterback Dak Prescott #4 of the Dallas Cowboys passes under pressure by the Denver Broncos defense in the fourth quarter of a game at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Dustin Bradford/Getty Images)
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DENVER, CO - SEPTEMBER 17: Quarterback Trevor Siemian #13 of the Denver Broncos and quarterback Dak Prescott #4 of the Dallas Cowboys shake hands on the field after a 42-17 Broncos win at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Dustin Bradford/Getty Images)
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DENVER, CO - SEPTEMBER 17: A Denver Broncos fan cheers in the fourth quarter of a game against the Dallas Cowboys at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Dustin Bradford/Getty Images)
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DENVER, CO - SEPTEMBER 17: Cornerback Jourdan Lewis #27 of the Dallas Cowboys runs after a fourth quarter interception against the Denver Broncos at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Dustin Bradford/Getty Images)
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DENVER, CO - SEPTEMBER 17: Quarterback Trevor Siemian #13 of the Denver Broncos scrambles against the Dallas Cowboys in the third quarter of a game at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Dustin Bradford/Getty Images)
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DENVER, CO - SEPTEMBER 17: A Denver Broncos cherleader performs during their game against Dallas Cowboys at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Matthew Stockman/Getty Images)
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DENVER, CO - SEPTEMBER 17: Terrence Williams #83 of the Dallas Cowboys tries to break free from Bradley Roby #29 of the Denver Broncos at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Matthew Stockman/Getty Images)
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DENVER, CO - SEPTEMBER 17: Brice Butler #19of the Dallas Cowboys makes a reception against the Denver Broncos at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Matthew Stockman/Getty Images)
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DENVER, CO - SEPTEMBER 17: Virgil Green #85 of the Denver Broncos celebrates after scoring a touchdown against the Dallas Cowboys at Sports Authority Field at Mile High on September 17, 2017 in Denver, Colorado. (Photo by Matthew Stockman/Getty Images)
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