Nov. 23: Formal negotiations for Manny Pacquiao-Floyd Mayweather began.
Dec. 1: Mayweather agreed to terms for a welterweight title bout versus Pacquiao.
Dec. 4: Pacquiao agreed to a proposal from promoter Bob Arum. Pacquiao and Arum met for two hours to discuss the proposed deal, according to Pacquiao adviser Michael Koncz, who told The Associated Press that "Manny has some additional requirements, requests, which Arum didn't think was a problem."
Dec. 22: The megafight was put in jeopardy after the camps' failure to agree on the manner of drug testing for the fight. According to Golden Boy Promotions, which represents Mayweather, Pacquiao refused to agree to the Olympic-style drug-testing procedures the sides had been negotiating. Mayweather requested that the drug testing for the fight be in compliance with the United States Anti-Doping Agency, which handles testing for Olympians, "to ensure fair play and sportsmanship by both fighters."
Dec. 23: Arum suggested an alternate drug test plan. An impasse over the drug-testing protocol to be used in the Pacquiao- Mayweather welterweight title bout could have been overcome if Mayweather agreed to allow the agencies used by the NBA, NFL and MLB to handle testing for boxing's biggest fight, Arum said.
Dec. 25: Angered by accusations from the Mayweather camp that he uses performance-enhancing drugs, Pacquiao said he would file a defamation lawsuit against Mayweather and Golden Boy Promotions.
"Enough is enough. These people, Mayweather Sr., Mayweather Jr. and Golden Boy Promotions, think it is a joke and a right to accuse someone wrongly of using steroids or other performance-enhancing drugs," said Pacquiao, who denied that he has ever used any banned substance and who has passed all his drug tests. "I have tried to just brush it off as a mere prefight ploy, but I think they have gone overboard."
Dec. 26: Golden Boy Promotions CEO Richard Schaefer said Mayweather's camp was OK to move off USADA rules.
"We are OK to move off USADA," Schaefer, who is representing Mayweather, told ESPN.com. "What we're saying, and what is important to us, is four things -- that the tests be random, that they include blood and urine and the time frame, meaning when you do stop the tests before the fight but know they will still be effective. Three of them we have agreed on -- random, blood and urine. So now it is a matter of the two sides working out the specifics of the cutoff date to assure it will still be effective."
Dec. 28: Arum announced he would choose another opponent for Pacquiao after failing to reach a deal for with Mayweather.
Dec. 30: Pacquiao filed suit in U.S. District Court against Mayweather Jr., Mayweather Sr., Roger Mayweather, Mayweather Promotions and Golden Boy Promotions executives De La Hoya and Schaefer.
Jan. 4: The two camps agreed to bring in a mediator to help work out differences.
Mediator Daniel Weinstein presided over the meeting in Santa Monica, Calif. Weinstein, a retired federal judge, also mediated the acrimonious dispute that kept Top Rank, Pacquiao's promoter, and Golden Boy, which represents Mayweather, from doing fights together for almost two years.
Jan. 6: Arum told ESPN.com that "the fight's off." The fight died after a last-ditch attempt at mediation between Top Rank and Golden Boy failed in an effort to determine the drug-testing protocol. Pacquiao had agreed to move off his hard-line stance of refusing a blood test inside 30 days before the fight, but Mayweather wouldn't budge off his desire for random testing all the way until the fight, according to Arum. Nor would Mayweather agree to a public apology for remarks he made accusing Pacquiao of using performance-enhancing drugs, Arum said.
Jan. 8: Pacquiao agreed to fight Joshua Clottey on March 13.
Jan. 12: Jerry Jones landed the Pacquiao-Clottey bout at the new Cowboys Stadium. "This is going to be one of the biggest events in the history of boxing," Arum said.
Feb. 26: Roach said Pacquiao "wants to fight [Mayweather] in the future.
"We're not happy with his remarks, and Manny really wants to fight him in the future because of the remarks he made," Roach said. "Manny, sometimes when he's shadowboxing, he shows me how Mayweather fights and how he'll take care of the problem, and I've never seen that before.
"He's trying to ruin our reputations and so forth, but we want to fight him, and we'll knock him out."
Arum still believes that Mayweather never wanted to fight Pacquiao, and his strict adherence to blood testing -- which is far more extensive than urine analysis required by the Nevada Athletic Commission -- was his way of getting out of it.
"We don't have to be geniuses to know what they were trying to do. They were trying to get into Manny's head so he'd be discombobulated," Arum said. "Mayweather against Manny is a no-contest, no contest. Manny would wipe the ring with Floyd Mayweather."