One of the biggest risks people take in drafting rookies in MLB fantasy drafts is the assumption that players will live up to their potential in their initial season in the big leagues.  Often times rookies with the most hype around them will be over drafted and potentially end up costing you a playoff berth.  There are only a couple of rookies that are probably worth taking a gamble on early in drafts this year and both are expected to start the year in the minor leagues.  Vladimir Guerrero Jr. of the Toronto Blue Jays and Eloy Jimenez of the Chicago White Sox are both expected to be called up in mid-April and both will be the top favorites to win rookie of the year.  Guerrero, the son of Hall of Famer Vladimir Guerrero is the game’s best offensive prospect since Mike Trout and Jimenez is the most likely rookie to belt 25 home runs this year.  There are several other rookies that could impact fantasy this year, but a word of caution not to over draft any of them, rather find the...