AMES, Iowa—Iowa State freshman Kasey Simpson hit her first two collegiate home runs and drove in seven in leading the Cyclones to a quick 9-1 win against South Dakota Tuesday at Cyclone Sports Complex.
 
Simpson hit a grand slam in the first inning, a solo shot in the fourth, and had a walk-off, two-run double in the bottom of the fifth inning. Simpson entered play with five RBIs all season and left with 12.
 
Kaylee Bosworth also went 3-for-3 for the Cyclones (19-15), which outhit USD 10-5. She also homered in the fourth inning, her fifth of the year, that made it 6-0.
 
South Dakota (22-18) scored on a throwing error in the top of the fifth inning. The Coyotes had runners aboard in each at bat, but two ground ball double plays and a base-running error kept Iowa State pitcher Shannon Mortimer away from a big inning. Mortimer struck out four and walked two.
 
USD returns to Vermillion to host Creighton at 3 p.m. Wednesday at Nygaard Field.