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A couple of things stood out, though. An impact hard enough to crack concrete wouldn't just break a rib or two. I'd expect severe internal injuries, bleeding, and widespread bone breaks.
Also, the pain of a broken rib is excruciating. It would make all movement on the affected side difficult, and fine motor movement next to impossible. The knife throwing scene can be justified by Dutch using his uninjured side (and by being that much of a hardcase), but you could consider emphasising his injury by having him pant for breath while speaking, grimace and favour his uninjured side.
RE: Rats In The Sewers - Part 3