Sure to be a one of the more important September callups, Kieboom has enjoyed a huge season at Triple-A. Washington’s top prospect struggled to hit in his first taste of the bigs in late-April/early-May, but the Triple-A seasoning he’s received since should stead him well. In 105 games, Kieboom is batting .305 with 16 homers while racking up the runs and ribbies. Consider him a tremendous dynasty option.