Former two-division world titleholder Orlando Salido, who likely will challenge junior lightweight titlist Vasyl Lomachenko this summer in a rematch of Salido's close 2014 decision win, first has to get through a tune-up fight on Saturday night (11 ET, beIN Sports Espanol) in his hometown of Ciudad Obregon, Mexico. But instead of Salido (43-13-4, 30 KOs), who is coming off an 11-month layoff, facing Thailand's Amphon Suriyo (18-2, 14 KOs) asplanned he will instead face last-minute replacement Aristedas Perez (30-9-2, 16 KOs), of Colombia, in the scheduled 10-rounder. Suriyo was dropped from the fight because of issues with his visa, Sean Gibbons, Salido's manager, told ESPN.

Welterweight world titleholder Kell Brook's dream will come true on Saturday when he defends his belt against Errol Spence Jr. at Bramall Lane, Sheffield United stadium, home of the soccer team he grew up cheering for as a kid. Over 27,000 fans are expected at the stadium for his fourth defense of the IBF title. Photo provided by Showtime.

Top Rank chairman Bob Arum told ESPN on Wednesday that if featherweight prospect Michael Conlan, the Irish Olympic star, wins his second pro fight on Friday night he will next fight July 2 on the Manny Pacquiao-Jeff Horn card in Brisbane, Australia, where there are thousands of Irish, including several of Conlan's family members who moved there seven years ago. Also on the card, Arum said junior bantamweight world titlist Jerwin Ancajas (26-1-1, 17 KOs), of the Philippines, will make his mandatory defense against Japan's Teiru Kinoshita (25-1-1, 8 KOs), who challenged Zolani Tete for the same belt in 2014 and lost a unanimous decision.

HBO and Showtime both had world title cards Saturday night that, for a change, didn't conflict. HBO, with the later start time of 10:15 p.m. ET/PT, averaged 961,000 viewers for the live airing of junior welterweight champion Terence Crawford's dominant win against Felix Diaz, according to Nielsen Media Research. That's the biggest viewership for any premium cable fight so far this year. It peaked at 1.036 million viewers. The average viewership was a 19 percent increase from Crawford's last HBO fight in December when his domination of John Molina Jr. averaged 806,000 viewers. The Ray Beltran-Jonathan Maicelo lightweight eliminator in the co-feature averaged 687,000 viewers (723,000 peak). On Showtime, which began at 6 p.m. ET, the Gary Russell-Oscar Escandon featherweight title fight main event averaged 481,000 viewers (517,000 peak). The Andre Dirrell-Jose Uzcategui interim super middleweight title bout co-feature averaged 354,000 viewers (459,000 peak). The Rances Barthelemy-Kiryl Relikh junior welterweight title eliminator averaged 267,000 viewers (295,000 peak). The opener, a brief tape delay of junior lightweight titlist Gervonta Davis' defense against Liam Walsh from London, averaged 228,000 viewers (253,000 peak).

It should come as no surprise but on Tuesday the Shannon Briggs-Fres Oquendo fight for a vacant secondary heavyweight world title was officially cancelled, as was the entire card. The show was scheduled to take place on June 3 at the Hard Rock Live at the Seminole Hard Rock Hotel & Casino in Hollywood, Florida, but canceled because Briggs tested positive for dramatically increased levels of testosterone in a random urine test conducted by the Voluntary Anti-Doping Association on May 14. Briggs' test result was ruled "atypical" when his testosterone to epitestosterone ratio was 7.89 to 1, which far exceeded the allowable threshold of 4 to 1 under World Anti-Doping Agency standards.

Super middleweight contender Jose Uzcategui was transferred to the MedSTAR trauma center in Washington D.C. for further evaluation after he was sucker punched by Andre Dirrell's uncle and co-trainer Leon Lawson Jr. after his DQ loss to Dirrell on Saturday. Photo provided by Sean Gibbons.

Ryan Walsh made a third defence of his British featherweight title by forcing an 11th round stoppage of Marco McCullough at the Copper Box Arena in London. Ryan's brother Liam was due to challenge Gervonta Davis for the IBF world super-featherweight title as main event later on Saturday.

Weights from New York for the Top Rank card on HBO on Saturday night (10:15 ET/PT) at Madison Square Garden: Terence Crawford 139.2, Felix Diaz 139.4, Ray Beltran 134.6, Jonathan Maicelo 134.8.

Ryan Walsh made a third defence of his British featherweight title by forcing an 11th round stoppage of Marco McCullough at the Copper Box Arena in London. Ryan's brother Liam was due to challenge Gervonta Davis for the IBF world super-featherweight title as main event later on Saturday.

UFC president Dana White tells me he anticipates a meeting with Al Haymon, Floyd Mayweather's advisor, next week to discuss the Conor McGregor fight. White added he and Haymon have been in contact "for months" and have a good working relationship. White also said he'll do his best to make the fight because it's what McGregor wants, but he won't agree to an unfair deal just to make it happen.

The Nevada State Athletic Commission set the officials for the Andre Ward-Sergey Kovalev unified light heavyweight world title rematch at its monthly meeting on Friday. The referee will be Tony Weeks and judges will be Dave Moretti, Steve Weisfeld and Glenn Feldman. The rematch will take place June 17 (HBO PPV) at Mandalay Bay in Las Vegas. Ward won a razor-close and controversial decision and three title belts from Kovalev in November at the T-Mobile Arena in Las Vegas.