BROOKSIDE - Shadyside topped Bridgeport for the third time in six days to advance the championship tilt.
The Tigers will face Steubenville Catholic at 5 Friday evening in Steubenville.
The Tigers jumped out to a 4-0 lead after three innings before watching the Bulldogs score three in fourth.
Austin Dorris, Zak Frizzi, Jared Brooks and Colton Campbell all singled in the second for the Tigers.
Brooks got the victory, fanning six and walking none. He retired 11 of the final 14 batters.
Bradley Pritchett crushed a three-run homer for the Bulldogs.