BALTIMORE – There are plenty of warning signs swirling around Adam Gase.

There’s the fact that he can’t win on the road. There’s the fact that, after Thursday night’s 42-21 loss to the Ravens, his Jets are now 0-4 against teams currently above .500. There’s the fact that he’s lost four games by 20-plus points this season, including this one.

But this defeat at M&T Bank Stadium emphasized yet another failing for the first-year head coach: He’s terrible at adjusting mid-game.

Surprisingly enough, the Jets’ offense actually fared quite well in the first half Thursday night. Yes, some errors proved costly and they recorded just seven points. But they put up more than 200 yards and were moving the ball effectively against a bona fide contender.

Then the Jets went 0-for-3 on their possessions in the third quarter Thursday night, tallying two punts and a lost fumble. In a vacuum, that could be dismissed as a short stretch of sloppy football.

But this is part of a much broader trend.

In fact, Gase’s offense has been among the NFL’s worst in the third quarter this season. In other words, his unit has been ineffective once he and opposing coaches spend 15 minutes tweaking their game plans to outsmart one other. He’s losing that battle of wits – constantly.

“I think every game is different,” Gase said, when asked about his team’s third-quarter issues.

In reality, though, they aren’t. The truth of the matter is that the Jets ranked 22nd in third-quarter points (3.9 per game) entering Week 15 – then posted zero against the Ravens. They also ranked 30th in possession percentage (44 percent) during that frame.

In total, the Jets have tallied 33 third-quarter possessions this year. They’ve punted 20 times. They’ve turned the ball over or allowed a safety eight times. They’ve scored five times.

They’ve reached the end zone just three times.

Yes, that’s right: Just nine percent of the Jets’ third-quarter drives have ended in touchdowns.

Oh, by the way, two of those three TDs came against the Raiders. So the Jets are actually 1-for-30 when it comes to scoring touchdowns in their other 13 third quarters.

It gets worse. In three of 14 games, the Jets have managed just one third-quarter possession. Five times, they’ve tallied just two drives.

That is a clear failing of coaching. Either the Jets aren’t adjusting at all or they’re making the wrong ones. This offense isn’t just incapable of scoring for 15 minutes of every game – it’s also unable to simply hold onto the ball. The Jets keep going three-and-out (or four or five or maybe six plays), then punting it away. And they’re heaping extra pressure on their defense as a result.

Even more to the point? The one time in the game when the Jets have found consistent success is the opening drive. They’ve scored on six of their 14 game-opening possessions – when Gase actually gets days on end to figure out a plan.

But when Gase has no choice but to think on his feet? The results simply haven’t been there.

Running back Le’Veon Bell said he hasn’t noticed the post-halftime sluggishness. Quarterback Sam Darnold said he doesn’t know why it’s happening, but “we just have to come out a lot sharper in the second half." Wide receiver Robby Anderson did his best to shrug it off entirely.

“I don’t really look back," Anderson said. "I just try to look forward. I don’t really pay attention to things like that. I just go out there and try to handle what I can.”

But, clearly, not enough of the Jets’ offensive playmakers are handling what they can once they come back out of the locker room.

That starts at the top with Gase.

Matt Stypulkoski may be reached at mstypulkoski@njadvancemedia.com. Follow him on Twitter @M_Stypulkoski. Find NJ.com Jets on Facebook.