Gilberto Celestino had a home run and drove in two runs and Alex Robles had three RBIs for the West Division champion Twins.
Elizabethton starter Josh Wilder held the K-Mets to one run over six innings. He allowed four hits and struck out eight batters. Jacob Blanks worked the final 2 1/3 innings for the save.
West Division runner-up Kingsport managed just six hits. Mark Vientos had two of them.
Celestino’s two-run homer keyed Elizabethton’s big inning. Robles and Ricky De La Torre each had an RBI single in the fateful frame.
The teams meet again today at 6 p.m. when the semifinal series moves to Elizabethton’s Joe O’Brien Field. The Twins can clinch the series while the K-Mets need to win to remain alive.
The Bluefield Blue Jays opened the other Appy League semifinal victory a 12-7 win over the Princeton Rays. The winners of the two best-of-three series meet for the league title.