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Trade costs Samardzija chance for All-Star outing

Oakland Athletics' Jeff Samardzija works against the Toronto Blue Jays in the fourth inning of a baseball game Sunday, July 6, 2014, in Oakland, Calif. (AP Photo/Ben Margot)

Fantasy baseball stock watch - Week 15

Maintaining your fantasy baseball roster can be a daunting task with all of the variables to keep track. Thank goodness for this weekly Yahoo Sports cheat sheet of players to keep and players to drop. Find out whose stock is going up and whose stock is plummeting this week.