The Terps' pitching struggles led them to an exit in the opening round of the conference tournament.
The Terps recorded their most wins since 2011 during the regular season, but still need a strong conference tournament to earn an at-large postseason bid.
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.
The Terps are looking to make their first NCAA tournament since 2012 despite a 8-11 conference record.
Montgomery started all five players celebrating their senior day in the second game of the Terps' doubleheader against Wisconsin on Saturday.
Courtney Wyche and Trinity Schlotterbeck combined to strike out 11 and only allowed three runs across the two games.
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.
The Terps gave up two runs in the sixth inning and failed to score apart from Ameila Lech's one-run homer in the third inning.
Sunday's final inning against the Hawkeyes showed the the Terps' recent struggles in closing out games.