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Welterweight contender Jessie Vargas preparing for his Sept. 13 fight against Aaron Martinez in Las Vegas. Photos by Naoki Fukuda.

Photos from Saturday night's Solo Boxeo card featuring Diego Magdaleno vs. Antonio Davis, Jose Benavidez Jr. vs. Javier Loya, and Mike Lee vs. Tyler Seever.

Photos from Mercito Gesta's ninth-round knockout of Ty Barnett, and Jesse Magdaleno's impressive stoppage of Aldimar Santos in the second round on Friday Night Fights.

Undefeated lightweight Diego Magdaleno and Antonio Davis weighed in for Saturday's fight card, which also features junior welterweight Jose Benavidez and light heavyweight Mike Lee.

Check out how Julio Cesar Chavez Jr. looks as he trains at the Wild Card Boxing Club in Hollywood, Calif., for his much-anticipated collision with RING middleweight champion Sergio Martinez on Sept. 15.

Photographer Naoki Fukuda's images from Robert Guerrero's welterweight debut in a 12-round unanimous decision win over Selcuk Aydin in San Jose, Calif.

Images from welterweight Shawn Porter's unanimous decision win over Alfonso Gomez and light heavyweight George Groves' sixth-round knockout of Francisco Sierra.

Junior lightweight Diego Magdaleno and his younger brother, junior featherweight Jesse Magdaleno, train for their back-to-back shows on Aug. 3 and 4 in Texas.

RING middleweight champion Sergio Martinez training in Oxnard, Calif., for his Sept. 15 fight against WBC titleholder Julio Cesar Chavez Jr.

Robert Guerrero and Selcuk Aydin hosted a media day in San Jose, Calif., ahead of their July 28 fight for the vacant WBC interim welterweight title.

Robert "The Ghost" Guerrero threw out the first pitch at an Oakland A's home game less than one week before his welterweight bout against Selcuk Aydin in San Jose, Calif.

Photographer Naoki Fukuda was on-hand to capture the action during Adrien Broner's fifth-round knockout of Vicente Escobedo in Cincinnati, Ohio.

Robert "The Ghost" Guerrero at Lake Tahoe training for his welterweight debut on July 28 against THE RING's No. 10-rated 147-pounder, Selcuk Aydin.

Images of Danny Garcia's thrilling knockout victory over Amir Khan to become unified titleholder and RING champion of the junior welterweight division.

Once-beaten middleweight standout Fernando Guerrero scored a one-sided unanimous decision over game Jose Medina on top of the undercard to the Amir Khan-Danny Garcia junior welterweight championship in Las Vegas on Saturday.

Photos of Amir Khan and Danny Garcia at the weigh-in for their July 14 junior welterweight title unification bout in Las Vegas.

Images from Carson, Calif., of Nonito Donaire's unanimous decision win against Jeffrey Mathebula and Kelly Pavlik's one-sided victory over Will Rosinsky.

Nonito Donaire made a July 4 guest appearance on the Spanish-language sports show Nación ESPN to promote his title-unification matchup with Jeffrey Mathebula this weekend in Carson, Calif.

Junior featherweights Nonito Donaire and Jeffrey Mathebula, and super middleweights Kelly Pavlik and Will Rosinsky met the press at Fortune Gym in Hollywood, Calif.

Photos from Saturday's ShoBox card featuring Cornelius Bundrage vs. Cory Spinks, Gary Russell Jr. vs. Chris Perez and Erislandy Lara vs. Freddy Hernandez.

Junior middleweight combatants Cornelius Bundrage and Cory Spinks, Erislandy Lara and Freddy Hernandez, plus featherweights Gary Russell Jr. and Chris Perez on the scales for Saturday's card in Indio, Calif.

Nonito Donaire training in San Carlos, Calif., to face IBF junior featherweight titleholder Jeffrey Mathebula on July 7, in what he says will be the first step towards unifying the division.

Images of Kelly Pavlik working out at Robert Garcia's Boxing Academy in preparation for his July 7 matchup with Will Rosinsky, the co-feature to Donaire-Mathebula on HBO's Boxing After Dark.

Hopefully getting all head butts out of the way early, Victor Ortiz and Josesito Lopez went face to face, then face on face, at the Hollywood weigh-in for their welterweight clash at Staples Center on Saturday.

Pictures from Tomasz Adamek's unanimous decision win over fellow heavyweight Eddie Chambers in Newark, N.J.

Images of Julio Cesar Chavez Jr's seventh-round TKO of Andy Lee to defend his WBC middleweight title in El Paso, Texas.

Images from Tim Bradley's controversial split-decision win over Manny Pacquiao to take the WBO welterweight title in Las Vegas.

A serene Manny Pacquiao faced a ripped-and-ready Tim Bradley at the weigh-in for Saturday's show in Las Vegas. Photos by Naoki Fukuda.

Combatants on the Pacquiao-Bradley undercard, which includes Jorge Arce vs. Jesus Rojas, Mike Jones vs. Randall Bailey and Guillermo Rigondeaux vs. Teon Kennedy, gathered at the final press conference before Saturday's big event.

Julio Cesar Chavez Jr. borrowed trainer Freddie Roach from Team Pacquiao to get in a workout at the Top Rank gym in Las Vegas ahead of his June 16 fight against Andy Lee.

Manny Pacquiao and Tim Bradley stood at the podium for the last time before their fight this Saturday, and Team Bradley showed up with a supersized display of confidence.

Manny Pacquiao and Tim Bradley were met by a horde of fans as they arrived in Las Vegas for their June 9 fight at the MGM Grand.

Manny Pacquiao wrapped up his training camp with one last workout at the Wild Card Boxing Club before heading off to Las Vegas to face Tim Bradley.

Images from the Showtime-televised card featuring Tarver-Kayode, Santa Cruz-Malinga, Quillin-Wright and Trout-Rodriguez at the Home Depot Center in Carson, Calif.

Manny Pacquiao held a workout for the media at a packed Wild Card Boxing Club on Wednesday, giving us a look at his preparations for Tim Bradley on June 9.

Tim Bradley stepped off the tour bus in Hollywood, Calif., today for a media workout at the Fortune Gym ahead of his June 9 bout with Manny Pacquiao.

A trio of Philadelphia fighters -- welterweight Mike Jones, junior featherweight Teon Kennedy and middleweight Jesse Hart -- held a media day workout for the June 9 Pacquiao-Bradley undercard.

As his father stood by, Julio Cesar Chavez Jr. worked out in preparation to defend his junior middleweight title against Ireland's Andy Lee at the Sun Bowl in El Paso, Texas on June 16.

Manny Pacquiao was hard at work today in the Wild Card Boxing Club, and a new face was among those watching: Pacman's spiritual advisor, Pastor Jeric Soriano.

From the MGM Grand in Las Vegas: images of Floyd Mayweather Jr.'s unanimous-decision win over Miguel Cotto to claim the WBA junior middleweight title.

Images from Saul "Canelo" Alvarez's unanimous-decision win over Shane Mosley to defend his WBC junior middleweight title at the MGM Grand in Las Vegas.

Floyd Mayweather Jr., Miguel Cotto, Shane Mosley and Saul "Canelo" Alvarez all took to the scales ahead of Saturday night's 'Ring Kings' event at the MGM Grand in Las Vegas.

Images from Chad Dawson's victory by decision over Bernard Hopkins in their rematch at Boardwalk Hall in Atlantic City, N.J.

Floyd Mayweather Jr. had a packed house at his Las Vegas gym as he hosted a media workout ahead of the May 5 megafight against WBA junior middleweight titleholder Miguel Cotto.

Photographer Naoki Fukuda's shots from Abner Mares' dominant win over Eric Morel to win the WBC junior featherweight title in El Paso, Texas.

Images from Anselmo Moreno's ninth-round KO defense of his WBA bantamweight title against David De La Mora in El Paso, Texas.

Miguel Cotto held an open workout today in Orlando, Fla., to give the media a look at his preparations for the May 5 fight against Floyd Mayweather Jr.

Photos of junior welterweights Mike Alvarado vs. Mauricio Herrera and lightweights Mercito Gesta vs. Oscar Cuero on the Rios-Abril undercard.

Images from Brandon Rios' questionable split-decision victory over a seemingly dominant Richard Abril on Saturday at the Mandalay Bay in Las Vegas.

Images from junior welterweight Albert Mensah's majority-decision win over Michael Katsidis on ESPN2's Friday Night Fights, plus welterweight Alan Sanchez's first-round KO of Artemio Reyes.