Chad Kelly has been charged with first-degree criminal trespass.
Kelly is the backup quarterback for the Denver Broncos.
Kelly allegedly entered a home uninvited and sat down on a couch while mumbling incoherently, the Englewood Police Department said.
According to an arrest affidavit, one of the homeowners, Nancy Lozano, was sitting on a couch just inside the front door while holding her young child when Kelly entered uninvited and sat down next to her, mumbling incoherently.
Police said the investigation is ongoing. Kelly did not have any alcohol in his system, police said.
Kelly made an appearance in an Arapahoe County courthouse later Tuesday morning and has been released.
"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."