Denver Broncos quarterback Drew Lock returned to practice Wednesday after missing two games with a rotator cuff strain in his right shoulder.

Head coach Vic Fangio said he hasn’t decided who will start Sunday when the Broncos (1-3) travel to face the New England Patriots (2-2).

Lock, 23, was injured when he was sacked in the first half of Denver’s Week 2 loss to the Pittsburgh Steelers. The second-year signal-caller has completed 23 of 38 passes for 236 yards, one touchdown and no interceptions in two games this season.

Backup Jeff Driskel, 27, replaced Lock against the Steelers and was sacked six times but threw for 256 yards, two touchdowns and one interception.

Driskel started the Week 3 game against Tampa Bay and completed 17 of 30 passes for 176 yards, one TD and one pick. Brett Rypien, 24, took over in the fourth quarter in the 28-10 loss to the Buccaneers and was 8 of 9 for 53 yards with one interception.

Rypien got the start last Thursday night against the New York Jets and passed for 242 yards, two TDs and three interceptions in Denver’s 37-28 victory.