Jacoby Brissett is starting over, again. This time, he’s leading a Ravens rescue mission.

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Zay Flowers has had all of two practices with Jacoby Brissett at quarterback. The Pro Bowl wide receiver might’ve needed only one to come away with a timely reminder: Change comes at you quickly.

“As soon as you’re coming out of your route or as soon as you think about looking up,” Flowers said Thursday, “the ball’s in your chest. He plays on time.”

And he’s arrived, the Ravens hope, just in time. The team’s playoff hopes have plummeted amid a four-game skid marred by historic margins and a string of quarterback injuries. Brissett will be the Ravens’ fourth starter in as many weeks when he takes the M&T Bank Stadium field Monday night against the winless Los Angeles Chargers.

Coach Jesse Minter called this week a “reset” for the Ravens (4-5). That starts with Brissett, a 33-year-old journeyman who’s made a career out of rescue missions.

“You’re around a lot of different people, a lot of different systems, different situations every year, kind of,” said Brissett, who’s started 73 games over his 11-year career, including at least five for five different teams. “So just being able to be flexible, that’s what kept me in this league for so long. And this is no different. So excited for this opportunity and trying to make the most of it.”

Brissett called his week in Baltimore a “crash course.” For all of his travels, he’d been traded only once before Friday — and that move, from the New England Patriots to the Indianapolis Colts, came eight days before his 2017 season opener. There was always time to study a playbook, learn an offense, develop a rhythm with his receivers. Sometimes it was as a Day 1 starter. Sometimes it was as a backup.

The Ravens could make no such allowances. On Nov. 1, on his first drop-back in an eventual blowout loss to the Buffalo Bills, star quarterback Lamar Jackson suffered a thumb injury that will sideline him indefinitely. Later in the first half, backup Tyler Huntley suffered a toe injury that could be season-ending.

So the Ravens went looking for help. Brissett had worked with Ravens passing game coordinator Marcus Brady in Indianapolis, where Brissett first arrived as a fill-in for the injured Andrew Luck. He’d worked with Ravens quarterbacks coach Israel Woolfork in Arizona, where Brissett started 12 games last season as a fill-in for the injured Kyler Murray.

After eight games, Brissett was on the outs in Arizona. He’d been benched in a Week 8 loss to the Dallas Cowboys and demoted to third string, behind Gardner Minshew and rookie Carson Beck.

A day after injured rookie quarterback Joe Fagnano was held to 60 yards passing in a 33-10 loss last Thursday to the Jacksonville Jaguars, Ravens general manager Eric DeCosta finalized a deal for his fourth QB1. The Cardinals received a fourth-round pick in next year’s draft and a seventh-rounder in 2028 in exchange for Brissett and a fifth-rounder in 2027.

“He’s a high-level, high-experience leader in the locker room, leader in the walk-throughs, leader in the meeting room,” Minter said Wednesday. “Not afraid to speak up and say, ‘Hey, I like this, I like that. Hey, you need to do this, make sure we’re on the same page here.’ … He’s just a vet that I think will impact young players in a great way with his demeanor, with the type of pro that he is, with the type of preparation that he’ll put in.”

It’s been around-the-clock work. Brissett flew to Baltimore and spent time with Ravens coaches at the team facility last weekend. After practice Wednesday and Thursday, he stayed on the field to work on his timing with his new wide receivers. He said, only half-jokingly, that his seven-minute news conference Thursday was “messing up the crash course right now.”

But the early reviews are promising. Defensive lineman Calais Campbell, who played with Brissett in Arizona, said he looks “real good” in practice, where he’s “ripping the ball.” Right tackle Roger Rosengarten said Brissett has delivered a couple of “wow”-level passes, a necessary ingredient in an offense that hunts explosive plays but has lacked them in recent weeks.

“We all know he can throw the ball,” said Flowers, who after a white-hot start has just three catches for 6 yards over the Ravens’ past two games. “He can spin it. But he’s just been connecting with us, telling us how he feels about a route, where we should be, talking to ‘D-Hen’ [running back Derrick Henry] about certain things coming out of the backfield. So he’s just letting his experience show.”

Brissett alone cannot be the Ravens’ savior. He went 1-11 in Arizona after replacing Murray. He was 3-5 this year, ranking No. 22 in expected points added per play and No. 14 in success rate among 31 qualifying quarterbacks. He’s never finished a season with a winning record as a starter. He’s only played in one playoff game, and that was a one-snap cameo for the Colts almost six years ago.

The hope in Baltimore is that the uplift can be mutual. The Ravens’ middling defense has been a slow starter in recent years before rounding into form down the stretch. The offense has Pro Bowl talents in Henry and Flowers, a potentially stable offensive line and a ballyhooed rookie play-caller.

“Our goal as a coaching staff is to try to get one [the first read] as open as we possibly can anytime we call a pass play, so that’s really what we’re trying to pride ourselves on,” offensive coordinator Declan Doyle said Thursday. “Then, when we might not be right, he [Brissett] may be able to make us right because he’s a little more comfortable playing into those tight windows.”

The Ravens’ schedule should help, too. The Chargers (0-8) are the NFL’s worst team. The Carolina Panthers (Week 11) are 3-5. So are the Houston Texans (Week 12). A long-awaited bye arrives in Week 13. The Tampa Bay Buccaneers (3-6) come to Baltimore a week after. Then an end-of-season AFC North gauntlet begins.

Brissett, a pending free agent, said he didn’t know when Jackson might be returning. He hasn’t even asked. Before the Ravens can entertain any comeback possibilities, they first have to stay alive.

“It’s one of those things where you kind of just take it day by day, and then future things happen when future things happen,” Brissett said. “But I’d be a fool to look forward. I’m trying to learn teammates, players, coaches, plays and get ready for a game. The last thing I’m worried about is something that’s going to happen down the road.”