With prospects, of course, tools are important, but often the overriding factor in progressing to the bigs is the ability to make adjustments, to make corrections when a weakness is exposed, and fact is, you don't know who that is going to be ahead of time. Some have that tenaciousness and aptitude and many don't. Some players with meager ability will make it because they have that ability, and many tooled up prospects will fail because they don't.