According to people with knowledge of Adrian Peterson's injury, the injury occurred in the best possible scenario. Usually when a player tears his lateral collateral ligament (LCL), two other ligaments ? often the ACL ? and sometimes two tendons tear as well. There are four corners that go along with an LCL ? the so-called posterior-lateral-corner ? that also usually tear in an injury like this. Luckily for Peterson and what makes his injury a bit different is that none of the tendons and ligaments in the four corners tore. Had they been torn as well, Peterson would have a much bleaker outlook. Vikings' trainer Eric Sugarman said Peterson is unlike most players he's been around. In fact, he compares his tolerance and drive to get back on the field to the drive shown by receiver Terrell Owens. Sugarman was one of the Eagles' trainers when Owens made an impossible comeback from an ankle and foot injury to play in the Super Bowl a few years ago. "I had never seen anything like Terrell until Adrian came along," said Sugarman. "They have the same drive. Every single thing we've asked him to do, and trust me, I've pushed and pushed, he's had no pain. I've given him things to see where he is that I thought he'd certainly struggle with, and he hasn't struggled with anything. He's really an unbelievable kid."