ALAMEDA – The Raiders have been blown out in three straight games. The latest rout came Sunday in a 42-21 loss to the Tennessee Titans. The first two happened away from the friendly confines of the Coliseum. This one happened here in the East Bay, the second-to-last time the Raiders will play in Oakland.

That means something to head coach Jon Gruden, who doesn’t want the fire to go out in Oakland without the Raiders making a final stand. The Raiders have one more chance to impress here next week against the Jacksonville Jaguars, and Gruden vowed to turn over every rock he can to produce a better effort than what the home fans saw this past Sunday.

That’s especially true of a defense that allowed 35 points -- the other seven came on a fumble returned for a touchdown -- and an incredible 552 yards to the Ryan Tannehill-led Titans.

The coverage was poor. The pass rush was bad. Tackling was subpar. Those facts have flown below the radar, with all the ire aimed at quarterback Derek Carr and his decision to throw it away on 4th-and-goal from the 1.

Poor defense is a major problem, though yards allowed have been an issue most of the season. Opportunistic and clutch play got the defense by in victories but has been absent in defeat. Against the Titans, that unit may have reached a new low.

“It’s like getting punched in the stomach. It knocks some wind out of you,” Gruden said. “Anytime a team takes the ball the length of the field that many times, it’s hard to do in this league. We’ve done a pretty good this year offensively of sustaining some long 80-yard drives, but sometimes you got to win the game of field position, you’ve got to force a three-and-out. We weren’t able to do that yesterday from the jump and very, very concerned about it and we’re going to make some changes. We’re going to get it right.”

One problem: there aren’t many changes left to make. It’s hard to imagine any promoted practice-squad players making a quantifiable difference. There’s enough depth to make some changes at linebacker. We’ve seen snaps dwindle from certain defensive linemen. The secondary could get shaken up a little bit. All that, however, might be shuffling deck chairs on a sinking ship.

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That won’t stop Gruden from trying. He refuses to wave a white flag on the season, even if better options aren’t crystal clear.

“[Recent play] is sickening. [Changes are] tough, but it’s a necessary evil,” Gruden said. “Right now, we’ve got to play better, and we’re going to play better, and there will be changes. There will be changes. What happened yesterday will not happen again. I can’t allow it to happen.”