I don't really care if David Wilson was actually crying on the sideline or not. It doesn't much matter, other than the fact that it's just a rare thing to see. He wasn't injured or anything of the sort -- instead, he fumbled on a fairly routine hit.
This was just an odd sight.
That has to be a tear. Just has to be. There's no other sweat around, and he's blinking like he's trying to hold back tears. And it's definitely coming from his eyes which, along with his expression, makes it seem like there's a tear trickling down his face.
Shake it off, bud. It's just a fumble. There's nowhere to go but up from here.