When John Harbaugh and Jim Harbaugh coach against each other on "Monday Night Football," it will feel much different than when they wrestled as kids.

John still remembers Jim Harbaugh going into his defensive "crab" posture on his back to fight off attacks from bigger brother John. Now Jim will be trying to fight off a third loss as NFL head coaches

"It used to get hot," John said of their competitiveness. "Back when were younger, it was every day – it was one fight or another."

The stakes will be higher. The audience will be massive. But the fiercely competitive brothers will try not to get caught up in their emotions when they meet as coaching adversaries for the first time since John's Ravens beat Jim's 49ers in Super Bowl XLVII in 2013.

"It's unique. It's never been done before and I don't know if it will happen again for a long time," John said following Thursday's practice as the Ravens prepare to face the Los Angeles Chargers. "It's hard to describe it. If you have a sibling you're close to, you probably understand it. You probably can put yourself in those shoes."

The Harbaugh family can take tremendous pride in having two brothers who have reached the top of their profession. John is a Super Bowl-winning coach in his 17th season, the winningest coach in franchise history with 179 victories. Jim has turned around the Chargers (7-4) in his first season, just months after leading the University of Michigan to a national championship.

They celebrate each other's victories, but it can't be that way Monday night. The Ravens (7-4) want this game badly, and Jim's team is standing in the way. While the players' focus will be on the field, All-Pro safety Kyle Hamilton senses that this game will be a little different due to the sibling rivalry.

"I've actually talked to Coach Harbs about it a little bit, just here and there having breakfast or whatever," Hamilton said. "From his perspective, he's done a good job managing emotions. We still have a game to play, but I think everybody understands it's kind of historic and it's cool to be part of history. It's always cool to see their family and what they've done for football and be part of it."

Hamilton was asked if there are brotherly bragging rights on the line.

"Oh yeah, for sure. I know me and my brother would," Hamilton said. "I'm sure Coach Jim is ready to play us again after the last time they played and Coach Harbs being the older brother has to put him in his place. It's cool to be part of it."

This will be the third meeting between the Harbaughs, with John holding a 2-0 advantage. They faced each other twice when Jim was head coach of the San Francisco 49ers, and their most memorable meeting occurred in Super Bowl XLVII, when the Ravens prevailed, 34-31, to capture Baltimore's second Lombardi Trophy.

For Jim, this isn't about getting revenge after that Super Bowl loss. It's about having another chance to chase the Lombardi Trophy, while being proud of the brother who's already won one.

"That loss was tough, but after some reflection and time, it's my brother and best friend," Jim told reporters in Los Angeles this week. "I'm really proud of him and happy for his success. It was earned."

Jack and Jackie Harbaugh won’t attend Monday’s game, but will watch their sons compete from Florida at their daughter Joani'shome. It will be another emotional night for the family, knowing that both sons can't win.

For the family, it will feel like a redo of watching John and Jim on opposite sidelines in the Super Bowl.

"We're thinking, you know, here we go again," Jack said on "The Lounge" podcast this week. "It was good and it wasn't so good. But we knew what it was about."

John is not surprised his parents decided not to attend the game.

"We've talked about a lot of different things besides football," John said. "It's not off limits, but what are we going to talk about? I understand why they're doing it. It's great, but it's hard."

Both coaches say the focus should be on the players, although the sibling rivalry has been the storyline grabbing the most attention.

"I'm sure he doesn't want to make it about him." Jim said. "I don't want to make it about me. It is what it is. Big game, for sure. Two teams having at it."

Ravens backup quarterback Josh Johnson played for Jim at the University of San Diego and says they brothers are cut from the same DNA.

"They love football," Johnson said. "They have a father who's a coach who loves football. They put the time in and work. They commit to the process of being great."

The Harbaughs staunchly support each other, and John isn't surprised to see the Chargers contending for a playoff spot after finishing 5-12 last season.

"One of the best coaches of this generation," John said. "Even if he weren't my brother, I'd say the same thing."

The Harbaughs will converse on the field before the game while their teams are warming up, but once the ball is kicked off, they'll be consumed with the competition. Meanwhile, another chapter in football's most high-profile sibling coaching rivalry will unfold.

"I'm pretty sure it will be good moments before the game," Johnson said. "During the game, it will be competitive like they don't know each other. After the game, it will probably be back to normal. That's what I expect."