OAKLAND, Calif. - For the second straight week, stunned silence and blank stares filled the visitors' locker room.

In every conceivable way, the Jets came up small on the road. And it all culminated in one embarrassing meltdown en route to a 34-20 defeat at O.co Coliseum on Sunday.

"Too many points, way too many third-down conversions, way too many big plays, way too many extra yards, too many missed tackles," Jets linebacker David Harris said. "That's the outcome you get when that happens."

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A week after they suffered a tough loss against the unbeaten Patriots, the Jets defense showed little fight against the upstart Raiders (4-3).

There was no pass rush, no tackling to speak of, and no semblance of the Todd Bowles team that began the year playing hard and giving offenses fits. Instead, the Jets looked out of sorts and out of sync from the moment they lost their starting quarterback.

On their first drive of the game, Ryan Fitzpatrick eluded tacklers on a 12-yard scramble but injured his left thumb as he was brought down by Charles Woodson. The injury paved the way for Geno Smith to see his first action of the 2015 season. But the substitution did little to spark the Jets (4-3) until the game was out of reach.

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"We didn't play good," said Bowles, who took issue with the lack of energy he saw from his players. "We didn't tackle, we didn't stop anybody. We didn't do anything right. We didn't coach them well. We didn't play it well. It was a bad performance."

Give Smith credit, though. He was a serviceable replacement for Fitzpatrick, completing 27 of 42 passes for 265 yards and two touchdowns. Smith also left the game briefly in the final minutes when he was drilled in the chest by a Raiders pass rusher. That resulted in Fitzpatrick re-entering for two plays before he again was replaced by Smith.

Smith may have made mistakes -- not being decisive in the pocket, stepping into sacks and failing to protect himself while on the run. But the loss wasn't on him. Instead, it was on the Jets defense.

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"I feel like I played like [expletive], to be honest with you," said cornerback Antonio Cromartie, one of the biggest culprits of missed tackles.

He estimated the Jets had more than 20.

"I don't know the number of missed tackles we had today, but we had a lot," said cornerback Darrelle Revis, who spent much of the day covering Amari Cooper (five catches, 46 yards). "That's something we've got to correct. We've just got to clean up some things. We've got to do better. It's always tough playing on the road. We've got to play better on the road."

Second-year quarterback Derek Carr torched the Jets for four touchdowns, including scores of 36, 49 and 59 yards. Carr completed 23 of 36 passes for 333 yards and a 130.9 rating. Latavius Murray (113 rushing yards on 20 carries) ran all over Bowles' defense, and Cooper and Michael Crabtree (seven catches, 102 yards) shredded the Jets' injury-depleted secondary. Andre Holmes helped to put away the Jets with two first-half touchdown catches.

"They just made more plays than us," said Brandon Marshall, who had nine catches for 108 yards.

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The Jets tried to mount a second-half comeback, as Smith connected with Eric Decker on a 4-yard TD with 7:11 left in the third before hitting tight end Kellen Davis on a 1-yard TD in the fourth. But the Raiders' 21-6 halftime lead proved to be an insurmountable hole.

"It's a body blow," Jeremy Kerley said. "It doesn't take anything away from us. There's going to be body blows in this league. We just have to bounce back from it."

Bowles echoed those sentiments.

"[It's] not a big blow. It's a blow," he said. "No different than a blow last week. You don't want to lose games. It's week by week, now we got beat. It doesn't feel any worse than last week or better than last week. It's a blow and we got to bounce back. We just have to step up and get ready for next week."