Moundsville scored three times in the bottom of the eighth inning to rally for a 6-5 win over Wheeling.
Post 3 will face Elkins, Saturday at 9 a.m. in another elimination game. The winner will face three time defending state champion South Charleston at 1 p.m. for the championship.
South Charleston defeated Elkins on Friday 4-3. Post 94 scored two times in the bottom of the ninth of the inning for the win.