Dalton McLain went 3-for-3 with an RBI single, Spano finished 2-for-3 and Idell added a two-run single for the Greene Devils (28-11-1).
Greeneville sophomore Keylan Newton tossed a two-hitter in the five-inning game.
Later Friday evening, the Greeneville boys soccer team successfully defended its Class AA title with a 3-0 victory over Loudon.
J. Elyze-Vital had a goal and an assist, and Devin Elyze-Vital and Ryan Thompson accounted for the other two goals.
The Greene Devils added their first state baseball title and second consecutive soccer crown to the school’s trophy case mere months after winning the Class 4A football championship.