Jason, Your insightful comments fully illustrate the 10,000 hour expertise challenge. I speculate that each of the issues you mention can be addressed by compre

Jason, Your insightful comments fully illustrate the 10,000 hour expertise challenge. I speculate that each of the issues you mention can be addressed by comprehensive coaching and incremental practice. Dan had no bad golf habits to break and has been coached from the very first stroke. Suppose Dan can be coached not to lose his temper? Suppose Dan can be coached to recover mentally from a poor shot? Furthermore, with an exercise coach hopefully Dan can avoid the injuries that plague golf pros. Update in response to your update: Coaching is what makes hours of practice productive. Bad days reinforce bad habits. Dan is already playing a variety of geographically dispersed golf courses and is accustomed to bad weather. According to his blog posts, his recent bad days result in better scores than his good days just a few weeks earlier. Jason, think back over your golf career - wonder how much better you could have been with no bad habits to unlearn, and constant comprehensive coaching. Nike is wise to back Dan. What a story!