Jacksonville Jaguars quarterback Blaine Gabbert left Sunday's game against the Oakland Raiders after he suffered an injury to his non-throwing shoulder.

Gabbert left the game during the second quarter after taking a hit from Raiders defensive tackle Tommy Kelly. He attempted to play through the injury, but left after the next offensive possession and was replaced by Chad Henne. The Jaguars said Gabbert is questionable to return.

The injury could be a big blow for the Jaguars' chances on Sunday as Gabbert was playing extremely well in the early going. Prior to going out, Gabbert had completed 8-of-12 pass attempts for 110 yards and a touchdown. He found Cecil Shorts for a 42-yard touchdown to give Jacksonville the lead in the first quarter.

With Gabbert out, the Jaguars are now playing without their entire starting backfield. Starting running back Maurice Jones-Drew left the game earlier with a foot injury. Henne has not gotten off to a quick start in replacement duty as he's completed just 1-of-5 pass attempts.