One year ago, Karissa Schweizer was predicted to finish sixth at the 2016 NCAA Cross Country Championships. Then a junior at Missouri, Schweizer shocked the running world when she out-kicked top contenders Erin Finn and Anna Rohrer to win the NCAA individual crown. Since that stunning performance, Schweizer has remained at the top with two more NCAA titles and a fourth-place finish in the 5K at the USATF Outdoor Championships. Three NCAA titles later, Schweizer is no longer an underdog, but a favorite to win her fourth NCAA championship.

Get an inside look at head coach Marc Burns' program at Missouri which has developed the breakthrough star. Watch the full episode of "Karissa Schweizer: The Unknown Champion."