Here's the explanation of how Chavis could possibly have won this award this year. The award isn't just based on on-field coaching ability.
"The criteria for the award are not limited to on-field coaching ability and the success of the team and players that these assistant coaches have worked with. Service to the community through charitable work and other volunteer activities, participation in AFCA activities and events, participation in other professional organizations and impact on student-athletes are all taken into account in the selection process."