Rodeo reckons he's a pretty good judge of character, and for the most part he knows what someone's about pretty soon after laying eyes on 'em. Half of it comes from his ability to observe and extrapolate, to take a situation and see almost all of its possible outcomes in vivid detail, and that sure is coming in to play here. He knows a couple of things for sure. One is that this fella must have been pretty damn amicable towards Teagan, because they're both still breathing. The stranger is built like a brick house, and if he were the type to throw that weight around first and ask questions later then he might have seen Teagan as an easy opponent to fend off. They run into folks out in the city all the time, and there are a lot of big men who think they can take Teagan down. Clearly, this guy isn't that type of man, because if he had made any moves that T saw as aggressive, he'd probably have a sunroof in his skull by now. She ain't exactly shy with her bullets, and Rodeo doubts it would have taken much. So this guy must have been stunningly cooperative, given the situation he was in.
But Rodeo sees the moment when that switch is flipped. It comes right towards the end of Teagan telling him how she wound up dragging the guy into his camp, and Rodeo reckons he can feel it winding up before it even happens. She gets to the point of saying they could shoot the sucker and take his bag, and then Rodeo knows the stranger has had enough. He knows, because that's about the point when he'd probably lose it too. If he had even managed to keep his cool as long as this guy did.
So when he sees the man start to rush Teagan, he's not exactly surprised. Rodeo's willing to bet the pot that she's been prodding him towards this the whole time. His Little Queen of Spades can be a real fuckin' pisser. Rodeo moves fast, stepping up to bring himself between the two of them, throwing a hand up to slap his palm against the middle of the stranger's chest. It's meant to snap him out of his rage more than anything else, get him to focus on Rodeo instead of on Teagan and her antagonizing statements.
"Hey," Rodeo snaps, squaring his gaze on the stranger's, wanting the man to meet his eyes and see that he means what he's about to say. "Don't do it. Nobody's gonna take your shit, man, alright?" Rodeo hopes that he's not making a mistake, but he takes his eyes off Teagan's abductee to look over his shoulder to her, leveling her with a hard glance. "Back off it, T. Y'all wanna brawl, you take it outside my gates." There's no fights allowed in his camp, at least not ones that don't come with spectators and wrapped knuckles. That's a rule that everyone learns fast. Rodeo looks back to Marcus, lifting his brows slightly. "I don't want your bag. Whatever you got is yours. All I want is to know why you were campin' in a piece of shit truck, and how the hell you got stuck eatin' granola."