keith kizer

The post-fight drug tests for Juan Manuel Marquez and Manny Pacquiao returned negative for anabolic steroids, masking agents and marijuana, according to Keith Kizer, executive director of the Nevada State Athletic Commission.

Does Juan Manuel Marquez rank with Julio Cesar Chavez Sr. among Mexico's all-time greats?

Floyd Mayweather Jr. plans to fight twice in 2013 against opponents to be determined on May 4 and Sept. 14, the two Mexican holiday weekends. 

Rapper 50 Cent was granted a promoter's license by the Nevada State Athletic Commission, although Floyd Mayweather Jr. is apparently no longer considered a partner in the company.

RING middleweight champion Sergio Martinez is recovering from knee surgery with an eye toward fighting on April 27 in his native Argentina.  

Sergio Martinez had surgery to repair torn ligaments in his right knee. THE RING middleweight champ wants to make a defense of his belts on April 27 and then face Julio Cesar Chavez in a rematch on Sept. 14.

Rapper 50 Cent to Floyd Mayweather Jr. on Twitter: "You should have know not to go against me PUNK."

50 Cent has apparently split from Floyd Mayweather and moved ahead with two fighters he signed: Billy Dib, who may defend his featherweight belt under Cotto-Trout, and Yuriorkis Gamboa, who fights on the Pacquiao-Marquez IV undercard.

Rapper 50 Cent has turned in an application for "SMS Promotions" to the Nevada State Athletic Commission -- and Floyd Mayweather's name isn't mentioned.

The Nevada State Athletic Commission executive director officially acknowledged Julio Cesar Chavez's positive drug test for marijuana on Friday.

Junior middleweight Saul "Canelo" Alvarez's fifth-round knockout of Josesito Lopez on Saturday drew a live gate of $1,618,150, according to Nevada State Athletic Commission executive director, Keith Kizer.

Sergio Martinez's unanimous decision over Julio Cesar Chavez on Saturday drew a live gate of $3,052,475, according to Nevada State Athletic Commission executive director, Keith Kizer.

WBC beltholder Julio Cesar Chavez weighed in at 158 pounds, his lightest in eight appearances as a middleweight, for Saturday night's defense against RING champion Sergio Martinez.

Rapper 50 Cent has officially applied for a promoter's license in Nevada.

Manny Pacquiao is apparently no closer to deciding from among at least two dates or among three opponents for his return to the ring. 

Lamont Peterson will be allowed to retain the IBF junior welterweight belt he won from Amir Khan last December, but he must make his first defense against former titleholder Zab Judah.

Super middleweight contender Andre Dirrell anticipates being back in action in November under TMT Promotions, the company formed by Floyd Mayweather Jr. and rapper 50 Cent.

Rapper 50 Cent is licensed to promote boxing shows in New York, but not yet in Nevada, where he has applied for a license and plans to eventually promote boxing events under The Money Team banner.

In his first public interview about his new venture with Floyd Mayweather, rapper 50 Cent announces that he has signed Australia's IBF featherweight titleholder Billy Dib to a promotional contract with TMT Promotions.

Andre Dirrell: "As 50 Cent and Floyd Mayweather boost my career, I can boost theirs as well, and we can make a big name for The Money Team."

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. 

On Friday, the IBF could render a decision whether or not to strip Lamont Peterson of the belt he won from Amir Khan in the wake of Peterson's positive drug test in March.

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. 

Lamont Peterson's camp says that his medical records will clear his name in the wake of his positive drug tests, and that his status as the WBA's "champion in recess" allows room for the fighter to contend for the organization's belt.

Amir Khan has been re-instated as the WBA's junior welterweight titleholder heading into Saturday night's clash with WBC beltholder Danny Garcia.

An investigation by the Nevada attorney general has determined that there was no criminal activity involved in Tim Bradley's split-decision victory over Manny Pacquiao on June 9.

In the wake of the Tim Bradley-Manny Pacquiao fight controversy, HBO's Harold Lederman says boxing should employ the best judges for the biggest fights, no matter what.

HBO commentator Jim Lampley calls Duane Ford, one of two referees who had Tim Bradley defeating Manny Pacquiao, "a standup guy." Ford will be a guest on Lampley's Fight Game, which airs Saturday night.

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

Tim Bradley on the Manny Pacquiao fight: "I wanted this, and I won it. You saw me raise my hands before the third card was even announced, because I was like, 'I won.'"

Bob Arum on Tim Bradley-Manny Pacquiao: "We have to have everybody, including myself and everybody connected with the fight in for some serious questioning."

Trainer Freddie Roach says he had a bad feeling as soon as he heard the first scorecard being read after Manny Pacquiao's fight against Tim Bradley.

Nevada Commission executive director Keith Kizer said that he will review the video of Tim Bradley's decision over Manny Pacquiao separately with each the three judges.

Promoter Bob Arum calls the notion that he somehow influenced the results of Tim Bradley-Manny Pacquiao "not true," and "preposterous."

Manny Pacquiao will earn a guaranteed $6 million compared to $5 million for Tim Bradley in their June 9 clash at the MGM Grand in Las Vegas.

IBF and WBA junior welterweight beltholder Lamont Peterson's camp has requested a June hearing with the Nevada State Athletic Commission to argue their case for being licensed.

The IBF will not decide whether to strip Lamont Peterson of his title until it reviews medical records. Also, the sanctioning body will not recognize Peterson-Amir Khan as Fight of the Year.

Lamont Peterson's positive drug test will be among the subjects addressed in the debut of Jim Lampley's "Fight Game" on HBO on Saturday night.

Amir Khan eyes return to the ring on July 7 or July 14 in the wake of his canceled return bout with Lamont Peterson.

Lamont Peterson was injected with testosterone before his title fight with Amir Khan because his levels were abnormally low, according to the physician who treated him.

Lamont Peterson tested positive for synthetic testosterone. 

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

WBC welterweight titleholder Floyd Mayweather Jr. will earn an all-time record purse of $32 million for Saturday night's clash with WBA junior middleweight beltholder Miguel Cotto.

Floyd Mayweather Jr. has been granted a one-fight license to face Miguel Cotto on May 5 at the MGM Grand in Las Vegas.

Floyd Mayweather will fight WBA junior middleweight titleholder Miguel Cotto in his next bout on May 5 at the MGM Grand in Las Vegas.

Will Floyd Mayweather receive a license to fight in Las Vegas in time for May 5, the date of his scheduled return to the ring? Executive director Keith Kizer says "it's too early to say."

Joel Casamayor's postive post-fight drug test for marijuana could lead to his being fined the entire amount of his $100,000 purse and suspension for up to a year.

Jermain Taylor could be reunited with promoter Lou DiBella when he returns to the ring on Showtime on Dec. 30.

Jermain Taylor will return on Showtime on Dec. 30 at 160 pounds, where he once reigned as undisputed middleweight champ.