GREENEVILLE — Kingsport catcher Darryl Knight hit a two-out home run in the ninth inning to lift the K-Mets to a 2-1 win over Greeneville in the opening round of the Appalachian League West Division playoffs on Thursday.The K-Mets return home to Hunter Wright Stadium tonight at 7 p.m. to host the Astros in the best two out of three series.Greeneville took the early lead when Connor Goedert drove a ball over the left field wall in the fourth inning to give the Astros a 1-0 advantage.Kingsport began its rally in the top of the seventh.