The Broncos placed Lock on the reserve/COVID-19 list ahead of Sunday's game against the Cowboys.
Lock becomes the third Broncos player to be ruled out for Week 9 due to COVID-19 protocols, joining tight end Noah Fant and guard Netane Muti. Both Fant and Muti were placed on the reserve/COVID-19 list as a result of positive tests of the virus, but it's unclear if Lock also tested positive or if he was merely ruled out as a close contact of an infected person or persons. In any case, Brett Rypien will step in as the backup to starting quarterback Teddy Bridgewater with Lock out Sunday.