mayweather jr.

Robert Guerrero is jumping two divisions to make his welterweight debut against rugged Selcuk Aydin.

Five-belt, three-division titlewinner Robert Guerrero threw out the first pitch prior to Sunday's Oakland A's-New York Yankees' game in advance of Saturday's bout with Selcuk Aydin on Showtime.

Undefeated welterweight prospect Keith Thurman dropped and stopped rugged veteran Orlando Lora in the sixth and round of the opening bout of HBO's Boxing After Dark broadcast from Cincinnati on Saturday.

Rolando Arellano claims that he is owed a $192,000 manager's fee by Victor Ortiz stemming from the fighter's ninth-round knockout loss to Josesito Lopez on June 23.

Vanes Martirosyan could face Erislandy Lara in a junior middleweight eliminator bout for the right to face WBC beltholder Saul "Canelo" Alvarez.

The random tests of urine samples taken from middleweights Sergio Martinez and Julio Cesar Chavez Jr. on July 11 have returned negative in advance of their HBO-televised clash on Sept. 15. 

Robert Guerrero on Selcuk Aydin: "With Selcuk thinking that I'm overlooking him, he has no idea what I've been through, so he had better be ready, and that's all I've got to say."

Former cruiserweight titleholder Enzo Maccarinelli has been banned for six months following a positive test for an illegal substance, according to the United Kingdom Anti-Doping Agency.

Could Amir Khan win a 147-pound rematch with Paulie Malignaggi, whom he knocked out in the 11th round as a 140-pounder?

Adrien Broner says upsets happen in boxing for two reasons: The losers are not him, and they are not Floyd Mayweather Jr.

Floyd Mayweather heads a list of Sports Illustrated's top 50 highest-paid American athletes.

The results of random urine test samples taken from Julio Cesar Chavez Jr. and Sergio Martinez on July 11 are expected sometime this week or early next week, according to Nevada State Athletic Commission executive director Keith Kizer. 

Undefeated welterweight contender Selcuk Aydin says he's coming to score a knockout against Robert Guerrero, whom he will face in the for WBC's 147-pound interim title bout on July 28 on Showtime.

Feisty at fifty: Julio Cesar Chavez Sr. says RING middleweight champion Sergio Martinez has "been talking a lot of bulls--t." Martinez meets his son, WBC beltholder Julio Cesar Chavez Jr., on Sept. 15 in Las Vegas.

WBC junior middleweight titleholder Saul "Canelo" Alvarez wants to defeat Josesito Lopez on Sept. 15, challenge Floyd Mayweather Jr. and eventually face countryman and WBC middleweight beltholder Julio Cesar Chavez Jr.

Unbeaten junior middleweight beltholder Saul "Canelo" Alvarez will defend his WBC crown against Josesito Lopez on a Showtime broadcast from the MGM Grand in Las Vegas on Sept. 15.

Former featherweight and junior lightweight titleholder Robert Guerrero sees a victory over Selcuk Aydin as an opportunity to secure much bigger fights, such as a showdown with Manny Pacquiao.

Southpaw junior middleweight contender Erislandy Lara has signed with advisor Al Haymon.

Undefeated junior lightweight titleholder Adrien Broner, who defends his WBO title against Vicente Escobedo in his native Cincinnati on July 21, will be featured in HBO's short documentary "2 Days: Adrien Broner" on July 7.

Danny Garcia and Amir Khan wll be subjected to random drug testing of blood and urine by the United States Anti-Doping Agency leading up to their July 14 fight, which currently is for the WBC and WBA titles.

A Nov. 10 rematch with either Tim Bradley, Juan Manuel Marquez or Miguel Cotto appears to be the likely scenario for Manny Pacquiao, while a highly-anticipated mega bout against Floyd Mayweather Jr. is considered a long shot.

Victor Ortiz is expected to receive surgery to repair a broken jaw on Sunday, according to his manager and his promoter.

Floyd Mayweather Jr. and Manny Pacquiao rank Nos. 1 and 2 among the world's top 100 highest-paid athletes, according to Forbes Magazine.

Juan Manuel Marquez on Tim Bradley-Manny Pacquiao: "I think that Pacquiao beat Bradley maybe by four points, because I had Pacquaiao winning eight rounds and Bradley winning four rounds."

A judge has denied an attempt by the lawyers of boxer Floyd Mayweather to gain house arrest status rather than complete the remainder of his 87-day jail sentence in the Clark County Detention Center.

Tim Bradley's split-decision victory over Manny Pacquiao to take the WBO welterweight belt generated nearly $9 million at the gate.

Josesito Lopez says he is motivated by the fact that Victor Ortiz has been named as the Sept. 15 opponent for WBC 154-pound titleholder Saul Alvarez in advance of his June 23 bout with Ortiz.

WBO featherweight titleholder wants to face Yuriorkis Gamboa in a clash of unbeatens if he gets beyond Vicente Escobedo on July 21 before his hometown fans in Cincinnati.

Manny Pacquiao: "I love Tim Bradley as a brother, but we have a job in the ring that we need to do. We have to hurt people...After that, it's nothing personal."

Manny Pacquiao's trainer, Freddie Roach, believes the fighter's marital troubles might have factored in to his sub-par performance against Juan Manuel Marquez in November.

Manny Pacquiao and Floyd Mayweather were close to finalizing a deal to fight in 2010, according to documents.

Floyd Mayweather Jr. on his upcoming jail sentence: "Can't nothing break Floyd Mayweather. Whatever hand is dealt to you in life, you've got to deal with that hand. That's called being a real man."

Tim Bradley: "Because there is a rematch clause in our fight contract I will have to beat Manny Pacquiao again in November."

Manny Pacquiao told Jimmy Kimmel he has "found out how to obey and to follow the commandments of God" as a result of studying the Bible.

Victor Ortiz's manager, Rolando Arellano, says that despite the near-loss of another major fight, VADA is at the forefront of a positive step for boxing and that "everyone should be put on notice."

Josesito Lopez will step up to replace Andre Berto against Victor Ortiz on June 23 at the Staples Center in Los Angeles, while heavyweight Chris Arreola will fight on the undercard.

Paul Williams promoter, Dan Goossen, calls a potential clash with WBC junior middleweight beltholder Saul Alvarez "a great fight for the sport, and a great fight for both fighters."

Could WBC 154-pound titleholder Saul Alvarez face former two-time welterweight beltholder Paul Williams, THE RING's No. 8-rated junior middleweight contender, on Sept. 15?

Undefeated featherweight contender Mikey Garcia might challenge for his first major world title against WBA beltholder Celestino Caballero on July 28 in Indio, Calif.

Floyd Mayweather Jr.'s unanimous decision over Miguel Cotto generated $94 million in pay per view revenue.

Robert Guerrero, who has been a world-ranked featherweight, junior lightweight and lightweight, will try to earn a top-10 ranking in the 147-pound division against undefeated welterweight contender Selcuk Aydin on July 28.

"The way to beat Floyd is to outwork him every minute of every round," says Manny Pacquiao's trainer, Freddie Roach. "Manny is the only fighter capable of executing that game plan."

Rapper 50 Cent, part of Floyd Mayweather's "Money Team," says he is considering making his pro boxing debut.

Oscar De La Hoya, who has faced both Floyd Mayweather Jr. and Manny Pacquiao: "Styles make fights, and the more Pacquiao pushes the fight, and the more he pressures Mayweather, the easier it will be for Mayweather."

Former welterweight beltlholder Carlos Quintana stopped junior middleweight up-and-comer Deandre Latimore in the sixth-round of their bout on the Floyd Mayweather-Miguel Cotto undercard in Las Vegas on Saturday.

Floyd Mayweather Jr. and Saul Alvarez will wear Grant Gloves, while their opponents, Miguel Cotto and Shane Mosley will wear Everlast.

Floyd Mayweather Jr. says his defensive style has always been a conscious choice, but if you think that means he doesn't know how to bang, think again.