Click the link for an updated version of this story: Browns announce RG3 will miss at least eight games with fractured coracoid bone in left shoulder
Browns quarterback Robert Griffin III could be out for a while with the left shoulder injury he suffered Sunday late during a 29-10 loss to the Philadelphia Eagles in the regular-season opener, FoxSports.com reported Monday.
ESPN reported Monday the injury is "potentially serious."
The Browns have yet to provide an updated on Griffin, who was scheduled to undergo an MRI on Monday. Coach Hue Jackson is set to address the media at 2:30 p.m. Monday.
If Griffin can't play Sunday in the home opener against the Baltimore Ravens, veteran Josh McCown would get the starting nod. Rookie third-round draft pick Cody Kessler would be the backup.
McCown faced the Ravens twice last season and went 1-1.
On Oct. 11, he completed 36-of-51 passes (70.6 percent) for 457 yards and two touchdowns with a passer rating of 111.3 in a 33-30 overtime win in Baltimore. McCown set a single-game franchise record for passing yards in the regular season.
On Nov. 30, he went 21-of-38 passing (55.3 percent) for 212 yards and a touchdown with a rating of 80.2 before he suffered a season-ending broken collarbone in the fourth quarter of a 33-27 loss at home.
Griffin said Sunday his non-throwing shoulder was sprained when he collided with Eagles rookie cornerback Jalen Mills as he ran out of bounds on third-and-14 from the Browns’ 4-yard line with 3:41 left in the fourth quarter. Mills hit Griffin in the chest and shoulder area, then Griffin landed on his left arm as he fell.
"I can move my left arm," Griffin said. "I’m in pain, but it will be OK. Just have to monitor it. We’ll see more tomorrow and see how my shoulder is feeling and just move on from there."
The Browns signed Griffin to a two-year, $15 million contract in March with the belief that Jackson could revive the 2012 NFL offensive rookie of the year's career. Yet Griffin, who arrived in Cleveland with a long history of injuries, was hurt in his first real game with his new team.
Griffin, 26, had a rough regular-season debut with the Browns even before the injury. He struggled with accuracy and finished 12-of-26 passing for 190 yards with an interception and a passer rating of 55.
After the injury occurred, Griffin returned to the game for the offense's final series and handed off three times.