by Alan Shipnuck  Jordan SpiethWhy He’ll Win: The defending champion has already shown an uncanny ability to peak for the game’s most important moments. The mini-swoon he’s in guarantees Spieth will put in extra preparation for Augusta.Why He Won’t: Is the pressure to follow up a monster 2015 getting in Spieth’s head ? Lately he’s been grouchy on the course, with his caddie and on social media. The Masters is not exactly a place to regain one’s equanimity. Our Made-up Odds: 4-1Bubba WatsonWhy