The Oakland Raiders will play the next two weeks without starting quarterback Derek Carr, who suffered a fracture in his back in their 16-10 loss to the Denver Broncos Sunday. According to Raiders head coach Jack del Rio, Carr suffered a transverse process fracture and will be sidelined for at least two weeks, but it could be longer. However, Adam Schefter of ESPN and Vic Tafur of The Athletic said Carr could be out up to six weeks.

Carr suffered the injury in the third quarter after he was hit by two Broncos defenders as he was falling to the ground.

After a visit to the medical tent, Carr went to the locker room and did not return. If Carr is sidelined for more than two weeks, it will be a major blow for the Raiders, who have high hopes this season but now have a 2-2 mark.Carr recently signed a five-year deal worth $125 million with Raiders.

The Raiders will turn to backup EJ Manuel as a starter when they take on the Baltimore Ravens Sunday. A former first-round pick by the Buffalo Bills in 2013, Manuel took over from Carr against the Broncos, completing 11 of 17 passes for 106 yards and an interception. Manuel played 28 games for the Bills, throwing for 3,502 yards and 19 touchdowns with 15 interceptions. He also ran for 324 yards and four scores.

Colts QB Andrew Luck to practice this week

Indianapolis Colts general manager Chris Ballard announced that starting quarterback Andrew Luck will join practice this week while he continues to rehabilitate from his offseason shoulder surgery. In an interview with Mike Chappell of WTTV-TV, Ballard said that the Colts would slowly incorporate Luck into teamwork before he gets back on the field.

Luck underwent surgery in January to repair a torn labrum in his shoulder. The Colts expected Luck to be ready for the start of the season, but his rehabilitation was delayed. Luck’s return will help the Colts (1-3) get back into playoff contention.

Redskins cornerback suffers fractured rib

The Washington Redskins announced that cornerback Josh Norman suffered a fractured rib in their 29-20 loss to the Kansas City Chiefs.

Norman suffered the injury just before halftime after he assisted on a tackle of Chiefs wideout Chris Conley. A source told Ian Rapoport of NFL Network Insider, the Redskins are concerned that Norman might have suffered an internal injury, possible a lung issue. Norman was a First Team All-Pro selection with the Carolina Panthers in 2015 before he signed a $75 million contract with the Redskins in 2016.