Wyche pitched a shutout as the Terps broke a three-game losing streak.
The Terps nearly upset a top-10 ranked opponent in the opening weekend for the second consecutive season.
The Terps cruised to a victory after scoring three runs in the opening inning and will play the winner of San José State and BYU on Friday.
The pitcher's big day contributed to the Terps clinching their final regular-season series.
Courtney Wyche limited the Fighting Illini's offense throughout the Terps' crucial win.
Sammi Woods didn't know who the Terps were before Mark Montgomery's offer. She's now their starting shortstop and leading the program's resurgence.
Sunday's final inning against the Hawkeyes showed the the Terps' recent struggles in closing out games.
The Terps have lost four of their last five games.
Trinity Schlotterbeck and Keira Bucher combined to allow just three hits as the Terps evened up the weekend series.
The Terps scored 22 runs in the three-game set against the Spartans.