We have seen plenty of unexpected pitchers become strong fantasy options so far this season. No one saw Kansas City Royals starting pitcher Kris Bubic breaking out in his return as a starter, or Matthew Boyd putting together an All-Star campaign. These two unlikely aces quickly emerged as must-rostered players early in the first half.In this article, we will look at whether Lucas Giolito, Trevor Rogers, Mitch Keller, and Emmet Sheehan are worth grabbing in Week 15 of the fantasy baseball season....