The Lady Mustangs scored two two-out runs in the top of the ninth to secure the victory.
"You want to win every time you take the field," said Monett coach Ty Goetz. "McDonald County is a quality softball team. We couldn't capitalize on their mistakes and we had a couple of mistakes that hurt."
The Lady Cubs grabbed a 4-3 lead in the third inning.
Allie Krueger drew a one-out walk and Raigan Ratliff singled. Kelsey Wiseman then hit a two-run RBI single.
Monett's defense was solid most of the evening. It was base running errors that hurt the Lady Cubs the most.
Three times runners were picked off taking too big a lead after pitches. Twice Monett was caught stealing and the Lady Cubs hit into two costly double plays.
"All season we have wanted to be aggressive on the base paths," said Goetz. "We need to be aggressively smart in order to succeed. We will learn from this game and get better."
Clutch hitting proved to be the Lady Mustangs best friend the remainder of the game.
In the top of the sixth, Courtni Smith hit a two-out, two-strike pitch over the outfield and turned it into an inside-the-park home run to tie the game 4-4.
In the ninth, it was a two-out, two-strike, two RBI double by Kali Hudson that did the damage.
Despite all the adversity, Monett still had a chance getting two runners on with no outs, only to see a double play and a strikeout end the contest.
"I thought we battled the entire game," said Goetz. "We put ourselves in a position to win the game. McDonald County is a good Class 4 school and we showed that we could go toe-to-toe with them."
Monett was only set down in order once in the nine-inning marathon and only had three strikeouts.
Wiseman was three for four at the plate. Abby Kruger hit a rare bunt double and Ratliff collected a single.