Catholic, which has won five straight games and 14 of its last 15, received solid pitching efforts from a pair of returning All-State performers.
Andy Hoyer (9-1), a second-team All-State selection a year ago went six innings, allowing just five hits and one walk, while striking out 10.
Returning first-team selection, Kiefer Hovorka worked a perfect seventh inning to pick up the save for the Irish.
"They've been doing really well," Mehle said of Hoyer and Hovorka. "They've just been pitching ahead. They've been throwing a lot of first pitch strikes and keeping the hitters off balance. They've been very effective."
The Irish topped Parkersburg Catholic 10-5 in their only regular season meeting at Triana Field.
And while Mehle hasn't decided who he'll send to the mound for the rematch, he knows that he has four solid options against the Crusaders among Hoyer, Hovorka, Golden and Wilcox.
"We have four very good arms so we have a lot of options going into each game in the postseason," Mehle said. "We'll make our decisions based on game situations as to who is going to take the hill. We feel confident in all four guys and our defense has been solid."
Demetrius Serevicz led Wahama's offense with a two doubles and a pair of RBI.