Olson has been part of the RiverHawks' staff for the past six seasons and served as defensive coordinator this past season.
Middleton rallied past Madison Memorial 8-6 in the sectional semifinal round earlier Monday in Baraboo.
The win is the sixth in a row for the second-seeded Hilltoppers, who will host third-seeded New Richmond on Saturday.
Lauren Pansegrau is preparing to lead the Middleton girls cross country team into Saturday's sectional meet during the WIAA's alternate fall season in the spring.
Central High School graduate Kobe King has entered the G League Draft pool.
Davis, a La Crosse Central senior who averaged 27.2 points per game, is named the top boys high school basketball player in the state by the Wisconsin Basketball Coaches Association.