'I will f--- your world up': Robert Saleh to Liam Coen in heated exchange after Jaguars' win over 49ers

The Jacksonville Jaguars found a way to upset the previously undefeated San Francisco 49ers on Sunday, 26-21, but there was some interesting -- and not-safe-for-work -- action after the final whistle. 

As the players made their ways back to their respective locker rooms, Fox cameras picked up Jaguars coach Liam Coen bypassing a handshake from 49ers defensive coordinator Robert Saleh and then an expletive-filled exchange between the two. The cameras appeared to show Jaguars offensive lineman Robert Hainsey physically holding his coach back, and 49ers staff doing the same for Saleh.

Check out what happened, courtesy of Action Sports Jax, a CBS/FOX affiliate.

Here's the exchange:

Coen: "Keep my name out of your mouth. Keep my name out of your mouth. Keep my name out of your f---ing mouth."

Saleh: "I was trying to compliment your ass. I will f--- your world up. You don't wanna f--- with me. I will f---ing end your f--ing life."

Jaguars offensive lineman Walker Little, who was between the two coaches, then turned toward Saleh and told him to "Get outta here," and the exchange ended.

49ers head coach Kyle Shanahan downplayed the incident when asked postgame.

"I didn't see what happened, so I'm not sure," Shanahan said. "I don't think he should be that sensitive about it. But is what it is. Not too worried about it."

If you were unaware, these two coaches were in the headlines this week. Saleh told reporters that the Jaguars have a "really advanced signal-stealing-type system where they always find a way to put themselves in an advantageous situation." Saleh made sure to mention that this system is legal, but it definitely has a negative connotation when you consider what happened with Jim Harbaugh's Michigan Wolverines. Either way, apparently the coaches that come from the Sean McVay tree are elite at stealing signs. 

"They're almost elite in that regard. That whole entire tree from Sean [McVay] to Kevin O'Connell to all of those guys, they all do it," Saleh said. "There's challenges. They're going to catch us in some situations where they have the advantage and we've just got to play sound, fundamental football and do our best to out-execute them."

Coen deflected questions before the game about the subject.

"I'm not gonna speak on that fully right now," Coen said with a smile. "We have a huge game for us coming up, we've got a great defense that we've got to go and attack and that's where our whole mindset and mentality is right now. ... Again, we're really trying to focus on a darn good defense."

Coen withheld comment after the game regarding his exchange with Saleh.