UFC on Fox: Lee vs. Iaquinta 2

UFC on Fox: Lee vs. Iaquinta 2 (also known as UFC on Fox 31) was a mixed martial arts event produced by the Ultimate Fighting Championship that was held on December 15, 2018, at Fiserv Forum in Milwaukee, Wisconsin, United States.

Background
After previously contesting two events (UFC Live: Hardy vs. Lytle and UFC 164) in Milwaukee at Bradley Center, the event was the first for the promotion at the newly built venue.

The event also marked the end of the UFC's seven years with Fox as a new broadcast deal with ESPN is slated to begin in January 2019. It was also the last UFC event to air on network television until UFC on ABC: Holloway vs. Kattar in January 2021.

A lightweight rematch between former interim title challenger Kevin Lee and Al Iaquinta served as the event headliner. The pairing met previously in February 2014 at UFC 169 with Iaquinta winning the fight via unanimous decision.

Erik Koch was expected to face promotional newcomer Dwight Grant in a welterweight bout. However, Koch was removed from the card on November 28 for undisclosed reasons and replaced by Zak Ottow.

A women's flyweight bout between Jessica-Rose Clark and Andrea Lee was expected to take place at the event. However, Clark was forced out of the bout on weigh-in day as she was hospitalized due to a weight cutting issue and deemed medically unfit to compete by UFC physicians. As a result, the bout was cancelled.

Bonus awards
The following fighters received $50,000 bonuses:
 * Fight of the Night: Joaquim Silva vs. Jared Gordon
 * Performance of the Night: Al Iaquinta and Charles Oliveira

Reported payout
The following is the reported payout to the fighters as reported to the Wisconsin's Department of Safety and Professional Services. It does not include sponsor money or "locker room" bonuses often given by the UFC and also do not include the UFC's traditional "fight night" bonuses. The total disclosed payout for the event was $1,216,000.


 * Al Iaquinta: $138,000 ($69,000 win bonus) def. Kevin Lee: $84,000
 * Edson Barboza: $100,000 ($50,000 win bonus) def. Dan Hooker: $75,000
 * Rob Font: $92,000 ($46,000 win bonus) def. Sergio Pettis: $33,000
 * Charles Oliveira: $180,000 ($90,000 win bonus) def. Jim Miller: $68,000
 * Zak Ottow: $20,000 ($10,000 win bonus) def. Dwight Grant: $21,000
 * Drakkar Klose: $72,000 ($36,000 win bonus) def. Bobby Green: $25,000
 * Joaquim Silva: $28,000 ($14,000 win bonus) def. Jared Gordon: $16,000
 * Jack Hermansson: $42,000 ($21,000 win bonus) def. Gerald Meerschaert: $35,000
 * Zak Cummings: $58,000 ($29,000 win bonus) def. Trevor Smith: $29,000
 * Dan Ige: $20,000 ($10,000 win bonus) def. Jordan Griffin: $12,000
 * Mike Rodríguez: $24,000 ($12,000 win bonus) def. Adam Milstead: $10,000
 * Juan Adams: $24,000 ($12,000 win bonus) def. Chris De La Rocha: $10,000