Yep Chiro. And just because things look out of line in his back, doesn't necessarily mean that's where it's at. They compensate for pain in wierd ways, just like we do when we hurt. Could be in his hips, shoulders, etc, and a good Chiro will be the one to help with that.
Don't expect one trip to do the trick. Sometimes it does, but sometimes more than one adjustment is needed. Little time off afterwards to so things that were sore have a chance to get unsore.