Keyon Blankenbaker was ranked by 247 Sports as the No. 85 overall recruit in the state of Illinois in the 2017 recruiting class. He was a two-time West Suburban Silver All-Conference cornerback. Blankenbaker helped lead Oak Park-River Forest High to a 7-3 record and the First Round of the 2016 Illinois 8A State Playoffs. Class 8A is the largest classification in the state of Illinois. He has a cousin already on the Cowboy team in freshman Mike Green II from Sacramento, Calif. Blankenbaker will rejoin his high school teammate and current Wyoming Cowboy freshman Jahmari Moore. Blankenbaker will also join the Wyoming Football program with Oak Park-River Forest teammate Jared Scott, who is another member of the 2017 Wyoming recruiting class. They played for head coach John Hoerster at Oak Park-River Forest.
Blankenbaker was recruited by Buffalo, Central Michigan, Cincinnati, Northern Illinois and Wisconsin.