Sometimes you catch lightning in a bottle when you take a player that you don't want, but end up drafting in your MLB Fantasy league due to circumstances that come up in a draft or auction. It's important to identify those players on your team and to sell them high if they get off to fast starts. Here are five of those guys:Zack Greinke, Arizona Diamondbacks - One thing I have always admired about 33-year old righty starting pitcher Zack Greinke is his honesty! Every time he has become a free agent, he has stated that…