UFC president Dana White said on Friday that he would pay $25 million apiece to Floyd Mayweather Jr and and MMA star Conor McGregor for a presumed boxing match with the split of additional pay-per-view revenue between the fighters to be determined.

White’s offer, put forth on Colin Cowherd’s sports talk radio show on Fox Sports Radio, comes two days after Mayweather, the five-division champion who retired undefeated from boxing nearly a year and a half ago, said he would fight McGregor for a base purse of $100m with McGregor taking home a career-high $15m plus a minor cut of the pay-per-view receipts.

Mayweather, who is in New York to support Badou Jack’s bid to unify super middleweight titles against James DeGale on Saturday night, dismissed White’s offer out of hand.

“He’s a f@#king comedian,” Mayweather said in a brief interview with TMZ.com.

Mayweather earned a guaranteed base purse of $32m for his most recent fight, a unanimous-win decision over Andre Berto in September 2015. That was down from a minimum of $100m for his previous fight against Manny Pacquiao, not including a portion of the pay-per-view revenue reported to be in the high eight-figure range.

McGregor’s highest disclosed purse in MMA is $3m. The Irishman last fought in November, when he knocked out Eddie Alvarez for the UFC lightweight title in UFC 205.