He could snap this guy like a twig, probably. If he wanted to, and God knows Joel would kind of like to kill someone about now. But as far as he can tell, this guy isn't one of the people who brought him here. Likely another prisoner, and as such, not a threat.

Hell, he's not even struggling, fighting back, fighting for his life. What the hell kind of place is this that he's not trying harder to stay alive?

Almost in disgust, he releases Sigma, sitting back on his heels, ready for any potential reaction. He won't kill him, unless Sigma tries to kill him, first.

"You're sure not actin' too worried if this is a fight to the death," he points out. It doesn't matter, of course - none of it matters, except finding Ellie.