If nothing else, this preseason is going to be more interesting than last, when the Jazz had 15 players with guaranteed contracts and no roster spots left to claim.    They will enter camp with 13 players under contract this year, one of whom will be two time zones away in Matt Harpring. The Jazz have to carry a minimum of 13 players under NBA rules, but would have only 12 available if they don't make an addition.    That would make things p...