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(Photo by Dustin Bradford/Getty Images) 
DENVER, CO - AUGUST 20: Tight end Virgil Green of the Denver Broncos runs onto the field during the pre-game ceremony before a preseason NFL game against the San Francisco 49ers at Sports Authority Field at Mile High on August 20, 2016 in Denver, Colorado. (Photo by Dustin Bradford/Getty Images) 
DENVER, CO - AUGUST 20: Quarterback Trevor Siemian of the Denver Broncos throws a first quarter pass under pressure by outside linebacker Ahmad Brooks of the San Francisco 49ers a preseason NFL game at Sports Authority Field at Mile High on August 20, 2016 in Denver, Colorado. (Photo by Dustin Bradford/Getty Images) 
(Photo by Dustin Bradford/Getty Images) 
Cornerback Chris Davis of the San Francisco 49ers is stopped on a first quarter kickoff return against the Denver Broncos during a preseason NFL game at Sports Authority Field at Mile High on August 20, 2016 in Denver, Colorado. (Photo by Dustin Bradford/Getty Images) 
(Photo: Dustin Bradford/Getty Images) 
Quarterback Mark Sanchez of the Denver Broncos. (Photo: Dustin Bradford/Getty Images) 
Quarterback Paxton Lynch of the Denver Broncos. (Photo: Dustin Bradford/Getty Images) 
Broncos quarterbacks Trevor Siemian and Mark Sanchez. (Photo: Dustin Bradford/Getty Images) 
DENVER, CO - AUGUST 20: Running back C.J. Anderson of the Denver Broncos celebrates after scoring a first quarter rushing touchdown against the San Francisco 49ers during a preseason NFL game at Sports Authority Field at Mile High on August 20, 2016 in Denver, Colorado. (Photo by Dustin Bradford/Getty Images) 
DENVER, CO - AUGUST 20: Running back Carlos Hyde of the San Francisco 49ers celebrates after scoring a second quarter rushing touchdown against the Denver Broncos during a preseason NFL game at Sports Authority Field at Mile High on August 20, 2016 in Denver, Colorado. (Photo by Dustin Bradford/Getty Images) 
(Photo by Dustin Bradford/Getty Images) 
DENVER, CO - AUGUST 20: Quarterback Mark Sanchez of the Denver Broncos is sacked for a 2 yard loss by linebacker Marcus Rush of the San Francisco 49ers in the second quarter of a preseason NFL game at Sports Authority Field at Mile High on August 20, 2016 in Denver, Colorado. (Photo by Dustin Bradford/Getty Images) 
(Photo by Dustin Bradford/Getty Images) 
DENVER, CO - AUGUST 20: Quarterback Mark Sanchez of the Denver Broncos passes against the San Francisco 49ers in the second quarter of a preseason NFL game at Sports Authority Field at Mile High on August 20, 2016 in Denver, Colorado. (Photo by Dustin Bradford/Getty Images)
DENVER — The Broncos hosted their first preseason game of the season Sunday, taking on the San Francisco 49ers.
With less than three weeks until the regular season begins, the head coach Gary Kubiak is getting closer to choosing a starter from his quarterbacks: Trevor Siemian, Mark Sanchez, and rookie Paxton Lynch.
Check out all the best moments from the game in our game photo gallery.
