Mayfield is out to beat the Ravens again. (John Kuntz, cleveland.com)

CLEVELAND, Ohio - Few in the NFL know Baker Mayfield as well as Ravens tight end Mark Andrews, who played with him the last three seasons at Oklahoma. And he knows that Mayfield is determined to rip the Ravens' hearts out this weekend in Baltimore and knock them out of playoff contention.

"No doubt,'' Andrews told reporters in Baltimore. "He's a killer. He doesn't mess around. He's fully intent on ruining our season. We'll be ready for it."

Andrews said Mayfield and Ravens' rookie quarterback Lamar Jackson, who threw him a 68-yard touchdown pass in their upset of the Chargers, have several things in common, besides the fact they're both Heisman Trophy winners.

"I'd say as far as their play, they're both incredibly good at extending plays, making a special play when there's nothing,'' said Andrews. "In terms of personality, guys like that have a certain thing about them - the 'It Factor' I call it. They're someone that you want to be around. There's something about them that makes people gravitate towards them. They both have that. That speaks a lot to who they are and what they're all about."

Like Mayfield, Jackson also has that killer instinct, Andrews said. It's helped both rookies win five of their last six games.

"Yeah, there's no doubt,'' said Andrews. "It's a little bit different type of killer. Lamar hates to lose. He's a guy that's. You know, you're down, you can rely on him, he's going to do everything he can to win - whether it's running the ball for fourth-and-inches or whatnot. He's a guy that's going to make the play. You saw it in the game when we were down - he makes that big play. That's the type of person he is, and that's the type of player he is, as well."

He described Jackson, the No. 32 overall pick, as a gamer.

"He practices well, but when it's a game, he's in a whole different mindset, whole different person, whole different persona about him,'' he said. "It's all about winning, and he's going to do whatever it takes to win."

Here are other things we learned as the Browns prepare to knock the Ravens out of playoff contention:

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Lamar Jackson upset the Chargers. (Kelvin Kuo, AP)

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1. Jackson developing as a passer

Jackson is known for his running, but he's developed as a thrower, as evidenced by his 68-yard TD toss to Andrews last week.

"It was awesome,'' said Andrews. "You dream of plays like that, and especially as a rookie, big plays like that scoring is incredible. Lamar threw an incredible ball - right over the linebacker, right in stride, really made my job easy. I really had to beat one guy. The blocking up front was great-great play call. So overall, it was really a team effort on the whole play."

Andrews said Jackson has made great strides as a passer since the start of the season.

"Everyone talks about him running and whatnot, and like, 'He's [not] not a quarterback just because he can run,'' said Andrews. "But ever since rookie minicamp, he's been a guy that can come in, make the throws and put the ball where it needs to be. I think he's grown a lot, especially as a rookie quarterback. It's not easy. I can't imagine being in that position playing quarterback. He's doing an incredible job. He's a special, special player."

Said Gregg Williams: "Do not disregard his arm strength. He can throw it a long way, too. They do a lot of good jobs in the run game, especially in the play-action run game when you're compensating so hard in the run game that all of a sudden he understands how to fake a guy open and get somebody else open.

"He's been able to do a good job and improve each week with throwing the route concepts that they are asking him to do. He's thrown the ball better and better each week."

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Ward suffered his 2nd concussion in 3 weeks. (John Kuntz, cleveland.com)

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2. Denzel Ward still in the concussion protocol

Ward began the practice week in the concussion protocol and will most likely sit out the Ravens game. It was his second concussion in three weeks, and the medical staff with proceed with caution.

He missed two games after the first concussion of his career Dec. 2 against the Texans, and returned for the Bengals game only to suffer another one.

He said he's not sure if Ward, voted to the Pro Bowl last week, will remain on the active roster for the finale.

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Perriman was a 1st round pick of the Ravens. (John Kuntz, cleveland.com)

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3. John Harbaugh on Breshad Perriman

Harbaugh is happy for Ravens' 2015 No. 26 overall pick Perriman, who's found success with the Browns after getting cut by the Ravens and then the Redskins in September. In the past three games, Perriman has caught a 66-yard pass from Mayfield, a 31-yard TD pass from Mayfield in Denver, his first in more than two years, and a 63-yard pass off a doubt-reverse from Jarvis Landry.

"That's kind of written history,'' Harbaugh said of the Ravens cutting Perriman. "You can go back and see that in terms of the injuries and things like that. Just happy for Breshad. He and I had this conversation numerous times over the years and then when he was leaving.

"Wished him nothing but the best when he was leaving. I do think and I've always thought that he was going to be successful in this league. He has had success there, and I credit the coaching staff there. They have done a really good job with him, and he has responded very well. I am happy for him."

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Nick Wass

Bengals Ravens Football

Baltimore Ravens head coach John Harbaugh walks on the sideline in the first half of an NFL football game against the Cincinnati Bengals, Sunday, Nov. 18, 2018, in Baltimore. (AP Photo/Nick Wass)

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4. Harbaugh on his job status

Harbaugh would be on the radar of the Browns and other teams if he wasn't returning to Baltimore next season. In fact, he'd be one of the hottest candidates on the market.

But the Ravens released a statement last week that he'll be back for 2019 and that the two sides have begun extension talks.

"There's really nothing to say about it,'' Harbaugh said on a conference call. "It just is what it is. I don't think it is a story."