Ortho Dx: Heel pain in a child who plays soccer every day

A 9-year-old boy presents with a 2-month history of right heel pain that has worsened over the previous 2 weeks. He is an avid soccer player who plays at least 2 hours every day, 6 to 7 days each week. His parents state that he is a very talented player who is on a number of all-star teams ...