Aaron Rodgers hurt on opening drive

GREEN BAY, Wis. -- The one player the Green Bay Packers probably can't afford to lose left Monday night's 27-20 loss to the Chicago Bears with an injury to his non-throwing shoulder.

Quarterback Aaron Rodgers landed on his left shoulder when he was sacked by Bears defensive end Shea McClellin on the game's opening series.

"It doesn't look good," A Packers source told ESPN's Ed Werder on Tuesday. "This is the one we couldn't afford to lose."

Packers coach Mike McCarthy told the source there was no specific diagnosis on Rodgers' left shoulder. The source told Werder that further tests are due Tuesday, including an MRI, but there was significant enough swelling to prevent doctors from determining the severity of the injury.

When I asked if Rodgers could miss the rest of the regular season, the source said, "Possibly, but they need to see more."

Packers team physician Dr. Pat McKenzie spent several minutes examining Rodgers on the bench before taking him to the locker room for further examination.

Following the game, McCarthy said the team would run more tests.

"Just had a chance to speak with Aaron; he has a shoulder injury," McCarthy said. "They want to run more tests. They don't have an exact diagnosis."

"No timeline, no exact diagnosis," McCarthy said.

Rodgers also said he is slated for more tests, telling ESPN Wisconsin's Jason Wilde via text, "We're getting some tests [Tuesday]."

Rodgers completed 1 of 2 passes on the opening drive, which resulted in a field goal. Seneca Wallace, signed by the Packers during the first week of the regular season, replaced Rodgers on the second series, a drive that ended in an interception.

With 6:54 left in the third quarter, Rodgers returned to the Packers' sideline in street clothes and received a loud ovation from the crowd. Rodgers shook hands with McCarthy.

Wallace, who finished 11-of-19 for 114 yards, an interception and no touchdowns, is the only other quarterback on the Packers' active roster.

Information from ESPN's Ed Werder was used in this report.