The preliminary results of the MRI performed on Jacksonville Jaguars quarterback Blaine Gabbert indicate he suffered a torn labrum in his non-throwing shoulder, a source told ESPN NFL Insider Ed Werder.

A determination about his availability for Sunday's game in Green Bay won't be made until after famed specialist Dr. James Andrews offers a second opinion later Tuesday.

The Jaguars already will be without starting running back Maurice Jones-Drew against the Packers after he injured his foot on Sunday against the Raiders. Jaguars coach Mike Mularkey updated Jones-Drew's status Monday, acknowledging that the three-time Pro Bowler could miss extended time.

Gabbert completed 8 of 12 passes for 110 yards and a touchdown before leaving the game in the second quarter in the loss at Oakland. The Jaguars were mostly inept after Gabbert left the game.

Backup Chad Henne completed 9 of 20 passes for 71 yards and was sacked three times.

Information from The Associated Press was used in this report.