What is meant by "early specialization" . . . does that mean specialization pre-high school? Specialization during high school? Specialization after high school?
For example, if you click through the link in Cressey's blog post to the Dr. Andrews interview, it's clear that Dr. Andrews is talking about ages 12 or 13 (e.g., "I want parents and coaches to realize the implications of putting a 12- or 13-year-old through the type of athletic work done by a 25-year-old"). Cressey, on the other hand, seems to be talking about high school (e.g., "State athletic associations in warm weather climates need to structure high school seasons to allow for athletes to compete in multiple sports."). That is logic I don't understand . . . I mean, an 18-year-old high school senior playing only one sport = bad; a 19-year-old college freshman playing only one sport = normal.