Bigby, a five-star recruit ranked No. 23 in her class by ESPN, announced her commitment to play for the Ducks on Sunday night via Twitter.
The 6-5 senior, a five-star recruit, also had offers from other elite programs such as Kansas and Arizona.
Cottrell, a four-star recruit, will play his senior year at Huntington Prep in West Virginia. And Isaacs, a five-star recruit, is transferring to Wasatch Academy in Utah.
The 6-foot-2-inch junior point guard has received offers from Long Beach State, Fresno State and UNR during his club basketball season with the Las Vegas Knicks.
The NCAA revised its recruiting calendar last year and reduced the number of weekends college coaches can watch and recruit during the club season.
The former Durango High standout, a four-star recruit who played the 2018-19 prep season in Los Angeles, is the first player in the 2020 class to commit to the Rebels.
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