The Denver Broncos are signing quarterback Blake Bortles to a one-year deal, a source told ESPN's Jeremy Fowler on Tuesday.

Bortles will join the Broncos after passing COVID-19 protocols, a source told ESPN.

Starting quarterback Drew Lock suffered a severe strain of the rotator cuff in his throwing shoulder on Sunday and will miss three to five weeks.

Jeff Driskel took over after Lock left Sunday's game in the first quarter. He wound up playing 64 of the offense's 77 snaps in the loss to the Pittsburgh Steelers, completing 18 of 34 passes for 256 yards, two touchdowns and an interception.

Bortles spent five seasons with the Jacksonville Jaguars from 2014 to 2018, playing in 75 games and throwing for 17,646 yards with 103 touchdowns and 75 interceptions. He threw only two passes in three games during the 2019 season with the Los Angeles Rams.