- Promotion: Ultimate Fighting Championsip (UFC)
- Title: “UFC on Fox 31“
- Venue: Fiserv Forum, Milwaukee, Wisconsin, United States
- Date: December 15, 2018
PRELIMINARY CARD
- Juan Adams vs Chris de la Rocha
- DIVISION: Heavyweight
- WINNER: JUAN ADAMS
- METHOD: Technical Knockout via Punches
- TIME AND ROUND: 0:58 of Round 3
- REFEREE:
- Mike Rodriguez vs Adam Milstead
- DIVISION: Light Heavyweight
- WINNER: MIKE RODRIGUEZ
- METHOD: Technical Knockout via Knee to the Body and Punches
- TIME AND ROUND: 2:59 of Round 1
- REFEREE:
- Dan Ige vs Jordan Griffin
- DIVISION: Featherweight
- WINNER: DAN IGE
- METHOD: Unanimous Decision
- ROUNDS: 3
- REFEREE:
- Trevor Smith vs Zak Cummings
- DIVISION: Middleweight
- WINNER: ZAK CUMMUNGS
- METHOD: Unanimous Decision
- ROUNDS: 3
- REFEREE:
- Gerald Meerschaert vs Jack Hermansson
- DIVISION: Middleweight
- WINNER: JACK HERMANSSON
- METHOD: Submission via Guillotine Choke
- TIME AND ROUND: 4:25 of Round 1
- REFEREE:
- Jared Gordon vs Joaquim Silva
- DIVISION: Lightweight
- WINNER: JOAQUIM SILVA
- METHOD: Knockout via Punches
- TIME AND ROUND: 2:39 of Round 3
- REFEREE:
- Bobby Green vs Drakkar Klose
- DIVISION: Lightweight
- WINNER: DRAKKAR ROSE
- METHOD: Unanimous Decision
- ROUNDS: 3
- REFEREE:
- Zak Ottow vs Dwight Grant
- DIVISION: Welterweight
- WINNER: ZAK OTTOW
- METHOD: Split Decision
- ROUNDS: 3
- REFEREE:
MAIN CARD
- Jim Miller vs Charles Oliveira
- DIVISION: Lightweight
- WINNER: CHARLES OLIVEIRA
- METHOD: Submission via Rear-Naked Choke
- TIME AND ROUND: 1:15 of Round 1
- REFEREE:
- Rob Front vs Sergio Pettis
- DIVISION: Lightweight
- WINNER: ROB FONT
- METHOD: Unanimous Decision
- ROUNDS: 3
- REFEREE:
- Edson Barboza vs Dan Hooker
- DIVISION: Lightweight
- WINNER: EDSON BARBOZA
- METHOD: Knockout via Punch to the Body
- TIME AND ROUND: 2:19 of Round 3
- REFEREE:
MAIN EVENT
- Kevin Lee vs Al Iaquinta
- DIVISION: Lightweight
- WINNER: AL IAQUINTA
- METHOD: Unanimous Decision
- ROUNDS: 3
- REFEREE: