I'm not a Dr. either but I've been in the PT field for 13 years. What Patty has is called kinesio tape. A lot of athletes use it (football/baseball/tennis/etc.) It's usually more of a preventative measure as opposed to an actual injury. Athletes use it to maintain proper alignment or posture within the body. The tape stretches and alligns muscles to pull in certian directions. Again, this helps maintain the proper alignment of muscles and can actually prevent injuries.
Bottom line, I don't think it's actual cause for concern. He should be fine. Hope that helps