The woman asked for help from another resident, who hit Kelly in the upper back with an aluminum vacuum tube and forced him out of the residence, according to the arrest affidavit.
After viewing security video, police found Kelly, 24, inside a black SUV in front of a theater near the woman's residence, KDVR reported.
The man identified himself to officers as Kelly, the television station reported.
“We’re going to look into this and look into it very seriously,” Broncos general manager John Elway said in a radio interview Tuesday afternoon. “The charges are very, very serious and we understand that so we will look into this and then make decisions as we go.”
Kelly made an appearance in an Arapahoe County courtroom later Tuesday morning. He posted a $2,500 bond and is due back in court on Wednesday.
Kelly is the nephew of Pro Football Hall of Famer Jim Kelly. He was drafted with the final pick of the 2017 NFL draft out of the University of Mississippi. He played high school in western New York, the Buffalo News reported.
"We are disappointed that Chad Kelly was arrested early this morning," the Broncos said in a statement. "Our organization has been in contact with Chad and we are in the process of gathering more information."
Kelly has played in one game this season.