Blaine Gabbert (questionable) and Maurice Jones-Drew (out) both got dinged during Jacksonville’s loss to Oakland. (Mike Ehrmann / Getty Images)

The Jacksonville Jaguars had enough offensive problems going into Sunday’s game in Oakland. But they left the Bay with two more big ones: injuries to their starting quarterback and running back Maurice Jones-Drew.

You could argue that second-year quarterback Blaine Gabbert has been no better — if not worse — than replacement level while leading Jacksonville’s last-ranked offense to this point, so a switch to Chad Henne could actually help. But Jones-Drew has been one of the league’s most consistent rushers over the last six seasons, and the lone reliable source of offense on a Jacksonville team starving for play-makers.

Jones-Drew, who suffered a left foot injury in Sunday’s loss, has already been ruled out of this week’s game in Green Bay, Jaguars Coach Mike Mularkey said during his Monday press conference. Mularkey did not offer a firm diagnosis but did confirm that Jones-Drew’s foot is not broken and said he hopes the team’s franchise running back will not miss significant time. He did, however, utter the dreaded word, “Lisfranc,” when discussing possible outcomes, the NFL Network’s Andrew Siciliano reports. the injury that has already sidelined New York Jets wide receiver Santonio Holmes for the season.

 Jones-Drew unsuccessfully held out for a new long-term contract with the team over the summer but had no difficulty regaining his starting role. He rushed for 177 yards and a touchdown in Jacksonville’s Week 3 win at Indianapolis — coincidentally their lone victory to date — but failed to crack 60 yards in the three weeks since.

Mularkey said Gabbert, who injured his shoulder, is questionable for Sunday’s game against the Packers.

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