The game was suspended Thursday after two innings and was completed Friday. Harbin struck out 14 batters, and the five hits she gave up were all singles.
Sixth-seeded JSU (28-25) advanced into Saturday's winner's bracket final against fourth-seeded Murray State, which beat No. 1-seeded Eastern Illinois on Friday. The Gamecocks' next game will be at 3 p.m. on Saturday, with the winner advancing to Sunday's championship round.
Harbin (15-13) shut out the best offensive team in the OVC this season. She walked just two in her 17th complete game and fifth shutout of the season, one that saw her throw 140 pitches, 102 for strikes. Her 14 strikeouts were one shy of her career highs and two away from the school record, while the win was the 57th in her career and moved her past Ashley Eliasson for second all-time in that category. She also moved her school-record strikeout total to 689.
JSU got both of its runs in the top of the ninth. After SIU Edwardsville Erin Greenwalt retired the first two batters, she allowed a single to Alexandria High grad Sara Border. Greenwalt then got Savannah Sloan to pop up to shallow right field, where second baseman Taylor Tooley dropped the ball and allowed Borders to score the first run of the game.
Sloan took second on Tooley's throw to the infield and then scored on Kelci Johnston's double to left center to give Harbin a 2-0 advantage. She didn't let up, getting a Brittany Toney lineout to a diving Krystal Ruth in left before striking out Rachel Coonrod and Samantha Stanicek to end the game.