After rarely committing errors in the regular season, the Sooners struggled to replicate the same crisp defense in the Women's College World Series.
OU committed three errors in four WCWS games, committing one in each Washington loss and one in the win against Arizona State.
The Huskies capitalized on the error Sunday, scoring on an unearned run in the first as Julia DePonte singled through the left side to plate Sis Bates from third.
Bates advanced to third thanks to a throwing error by OU catcher Lea Wodach earlier in DePonte's at-bat.