Vikings running back Adrian Peterson has apologized to his fans for being absent from a youth football camp carrying his name in Oklahoma. Peterson has appeared at the camp near the Oklahoma campus in Norman the past three years, but says he won't be able to make it Thursday or Friday for this year's event. "I want to apologize to all the fans about the confusion regarding the camp in Norman," Peterson said in a statement. "I hosted camps in Palestine and Tyler, Texas, last week that went great. Due to ProCamps misunderstanding of my schedule, I was never able to host this year's Norman camp on their scheduled dates, but look forward to being back in 2012."