. . ENGLEWOOD, Colo. (AP) - The Denver Broncos won't have any of their four quarterbacks available on Sunday when they take on the New Orleans Saints over coronavirus concerns, several people familiar with the NFL's investigation told The Associated Press. One person told The AP that starter Drew Lock, backup Brett Rypien, and training team veteran Blake Bortles were considered high-risk close ties with No. . 3 Quarterback Jeff Driskel on Wednesday, the day before Driskel tested positive for COVID-19. Another person, who also spoke on condition of anonymity to discuss the sensitive issue, said the four quarterbacks did not appear to be wearing their masks all the time, as the league's pandemic protocols dictated. People spoke to The AP on condition of anonymity because the NFL and Broncos made no announcements after Lock, Rypien and Bortles were ordered from the practice field into isolation on Saturday. The Broncos battled it out to prepare rookie receivers Kendall Hinton and No.. Royce Freeman runs back to share snaps on quarterback Sunday when Denver (4-6) receives the Saints (8-2). . Hinton was the college quarterback for three seasons and Freeman is the team's emergency QB. The NFL gave the Broncos permission to train on Thanksgiving after Driskel tested positive for the virus, and again on Friday after kick-returner Deontae Spencer along with two employees tested positive. However, coach Vic Fangio decided to close the building on Friday and the team held meetings remotely. Lock, Rypien and Bortles loosened up before Saturday's brief walkthrough when they were pulled off the field and sent home. They must be quarantined for several days and must continue next week to return. . .