Dear Jim, 
 Sorry for the slight delay in getting back. The title is great, though I think "Gold Medal Mindset" may work best. And I wouldn't touch the subtitle: it's great. 
 
Many readers would respond well to familiar examples, so such a book could benefit from a case study approach. Each chapter or insight could be built around one significant figure: Lou Gehrig and his farewell speech, for example.

Another possibility is linking applications to everyday life: I remember, for example, someone noting that part of NASCAR's popularity is that, unlike other sports, everyone drives (not everyone can ice skate); therefore, NASCAR (i.e., driving really fast) is something that everyone can relate to. 

I think a lot depends on the kind of tone and audience: is this something for someone who wants to pursue sports a little more rigorously? Or someone who want to apply that kind of dedication and professionalism to his/her career or family? Perhaps a bit of nostalgia, as well, in remembering childhood heroes (this could lend itself well to reproducing classic baseball cards or Wheaties boxes as illustrations). 

It sounds like a subject and an approach with a great deal of promise. 

Best, 
EditWrite