Still, the Steamers jumped in front in Game 2, getting kills by Leonard and Chelsea Lesniewski to go up 2-0 and a block by Leonard and Camerin Huizenga to make it 3-1.
But, Fieldcrest scored eight of the next nine points, with kills by Petersen counting for three of them, and was in control the rest of the way.
“They were hitting hard, and we just couldn't dig up all their hits,” Leonard said.
The lead hit 10 twice, 21-11 and 22-12, but Fulton had one final push left.
Lesniewski had back-to-back kills, Beiermann and Renkes combined on a block and Beiermann added another kill to make it 22-16. After a Fieldcrest point, kills by Renkes and Jamie Huennekens cut it to 23-18, but the Knights ended it by scoring the final two points.
“They had their highs and their lows in Game 2, and the problem is you can't have those lows, not now, not in postseason and not playing better teams,” Germann said. “Fieldcrest is a great team. They hit well. They did a good job.”
Petersen led Fieldcrest – which will play Albion Edwards County in Friday's 1:30 p.m. semifinal at Redbird Arena in Normal, Ill. – with 10 kills, while Ruestman added seven and Holland had five.
“It is unbelievable,” Petersen said. “I don't know how to describe how I feel right now. It's just awesome.
MINONK FIELDCREST 25-25, FULTON 23-18
Fulton statistical leaders
Kills – Betsy Leonard 9, Chelsea Lesniewski 8, Rachael Beiermann 4. Assists – Olivia Edfors 10, Beiermann 8. Digs – Averi Leitzen 15, Lesniewski 8, Beiermann 5. Blocks – Camerin Huizenga 3, Beiermann 2. Ace serves – Leonard 2, Lesniewski 1.