If your back is..
If your back is still bothering you, you may want to get into something like tankers, or dry van and reefer companies that do mostly drop and hook, or pay for lumpers. As others have said, don't volunteer information. If asked about the scars, tell them the truth, but too much information can cause you problems. I do know of one tanker company that hires newbies, but you need to live near Tampa, Fl. and attend Pinellas County Technical School to get in. They train drivers specifically on tankers. And Blubird is right about getting in with companies that have drop and hook, or pay for lumpers, as a newbie.