The Redhawks trailed 5-0 in Game 1 before a five run sixth inning tied it up. Brian Tougher and Franzee Barlamas got La Roche on the board and Williamson followed with a 3-run blast over the left field wall.
Marietta grabbed the lead in the seventh on a sacrifice fly. They also drew a bases loaded walk and held the Redhawks scoreless over the final three innings to earn the two run win.
Game 2 starter Tanner Wilt retired the first nine batters and Barlamas smoked a two-run double to put the Redhawks ahead in the third.
Marietta got one back in the top of the fifth but La Roche extended their lead to 5-1 with Navedo's homer and a Lemley 2 RBI double in the bottom of inning. Lemley then put the home team ahead 7-1 with his two-run dinger in the seventh.
The Pioneers rallied with seven runs in the top of the eighth and went on to win 10-8.
Lemley had a strong game at the plate with a home run, double and 4 RBI. Barlamas went 3 for 5 with 2 RBI and 2 runs scored while Navedo scored twice and hit in a run. Mitchell Yard had his first career RBI for La Roche.
Wilt struck out 6 and gave up just one run on 4 hits in six innings of work.
The Redhawks will travel to Heidelberg on Tuesday for a single nine inning game.