The number of prospects capable of impacting your fantasy baseball season is dwindling but some remain.Rosters have been expanded at the MLB level but the minor league playoffs are also in full swing. As a result, some prospects with the potential to impact the big leagues are still in the minors. But they will likely be called up with the conclusion of their playoff runs.Other prospects affiliated with MLB teams in the playoff hunt, such as Carter Kieboom or Tanner Houck (if the Red Sox can be ...