There's a stray cat running around the neighborhood that has a really nasty wound. I've been keeping an eye on him. Can I just bring him in?

yes if you bring them in they will find

Call them first and ask. They will tell you what to do.

You can try. Humane society has better cat care though. Bigger cages. Depending on how feral the cat is they might not keep him though. I'd use sunny sky's as a plan b.

It honestly depends if they have space. Unfortunately the only place that could probably take him is the humane society