JACKSONVILLE, Fla. -- If the level of concern over Jacksonville Jaguars quarterback Blake Bortles wasn’t at a crisis level before, it certainly has to be now after a 33-16 loss to the Oakland Raiders on Sunday at EverBank Field.

Bortles turned in another clunker Sunday, this time against one of the worst defenses in the NFL, and it is now time to start wondering if the franchise has made a mistake in tabbing the former Central Florida standout as the player around which it can build the team.

Bortles completed 23-of-43 passes for 246 yards, 1 touchdown and 2 interceptions. He was sacked once and ran for 33 yards on five carries. He started the first quarter 1-for-6 for 3 yards and 1 interception, which came after he threw into triple coverage in the end zone.

The Raiders entered the game ranked last in the NFL in total defense (444.8 yards per game) and pass defense (312.7 yards per game). The Raiders were giving up 27.2 points per game, but the Jaguars managed only one touchdown in four trips to the red zone.

"Obviously, not playing good," Bortles said. "I couldn’t tell you [why]. I wish I knew. I’d fix it. It’s just a continuing thing, and hopefully find a way to turn it around and solve some problems."

Bortles had what appeared to be a breakout season in 2015, setting franchise records in passing yards (4,428) and passing touchdowns (35) after spending the previous offseason working with throwing coach Tom House to fix his mechanics and footwork.

That hasn't carried over into 2016.

Bortles has thrown nine touchdowns and nine interceptions -- including two in the end zone -- and turned the ball over 10 times in six games. His mechanics seem to have regressed, too. His windup has lengthened, and he’s starting his throw from his hip at times instead of holding the ball shoulder-high. Though his completion percentage was above 60 heading into the weekend, he has missed open receivers.

The only time he seems comfortable is when the Jaguars are going no-huddle.

Making things worse: Bortles has had just seven turnover-free games in his career. The Jaguars are 5-2 in those games and 5-23 in all other games.

"I’m not going to sit here and protect every throw he makes, but you are right, there are throws we’d like to be better, and we’d like to have more accuracy," coach Gus Bradley said. "But you see that in the league. I just saw a quarterback the other night, an NFL player, and he threw two balls behind and in the dirt. Some of those are going to come up. When we are in a situation where we aren’t doing what we want offensively, those things get more magnified. He understands that part.

"Accuracy is important. Timing, accuracy, decision-making, catching the balls that are thrown to you, all those things – staying in games, making plays in the end zone. We’ve got to continue to build off of those things and gain confidence with every drive that we have out there."

To be fair, the offense’s struggles aren’t all on Bortles. He has had plenty of help bogging the offense down -- and not just on Sunday.

The Jaguars have too many playmakers to be this unproductive in the passing game, but some of those players aren’t performing, either. Receivers Allen Robinson and Allen Hurns and tight end Julius Thomas aren’t getting much separation. That may be partly due to the playcalls, but those guys have to make plays. Robinson has been getting mugged all season, but that’s what happens to a team’s No. 1 receiver, and the Jaguars have to adjust. He’s also had several drops, including one in the end zone that turned into an interception and two on Sunday against the Raiders.

The offensive line gets minimal push and movement, and there’s little room for running backs T.J. Yeldon and Chris Ivory. Aside from Ivory’s 42-yard run against the Raiders, they have rarely been able to find open space.

"I wish I had all the answers, but I don't," tight end Marcedes Lewis said. "Me, as one of the leaders on the team, I have to be stronger for [Bortles] and do my part. Can't really point no fingers. We all have a part in this whole deal. Not going to shy away. We're going to continue to fight, and everything is right there still in front of us. It's crazy with as bad as we played today we can still go out there and do what we need to do. But we've got to stop the bleeding."

Bortles has been the biggest issue, and now the Jaguars have to wonder if he is going to develop into their franchise quarterback. That certainly stings, especially since Bortles’ counterpart on Sunday seems like the real deal. Derek Carr was taken 33 spots after Bortles (No. 3 versus No. 36) in 2014 but has outperformed Bortles.

Counting Sunday's game, Carr has more career touchdown passes (66) and fewer interceptions (28) than Bortles (55 TD passes, 44 INTs).