Brian Stann explains his injury that kept him from fighting Hector Lombard at UFC on Fox 4:

"It’s a grade two separation of my right AC joint, which is what I’m feeling right now, and that’s a 6 to 8 week recovery, no surgery luckily but you know hopefully I can get this thing healed up as soon as possible and get my range of motion back, but for right now, I can’t even pick my arm up."

"It’s happened once before in both shoulders, it’s a really common football injury so it’s happened to me in high school, but it has not happened before. I was actually sparring and UFC heavyweight Shawn Jordan, we were against the cage and I stuffed the takedown and he went for a hip toss, and when he threw for the hip throw he actually landed directly on my shoulder, all 275 pounds of him, which was not really intended. I think he slipped, he knew not to land on me if he was to land a takedown but it just happened and my shoulder didn’t really stand a chance. I landed directly on the shoulder with his hip right on my arm, and you could hear the crack right away. It’s one of those feelings where you know when you’re hurt, and you know the difference of when you’re injured, and unfortunately I was injured and you know, the x-rays and the doctors confirmed everything that day."