The case stemmed from a hair-pulling, punching and arm-twisting argument with his ex-girlfriend Josie Harris while two of their children watched in September 2010.
“Punishment is appropriate,” Justice of the Peace Melissa Saragosa said after a prosecutor complained that Mayweather has been in trouble before and hasn’t faced serious consequences.
“No matter who you are, you have consequences to your actions when they escalate to this level of violence,” she said.
Good behavior could knock several weeks off Mayweather’s sentence. but he will likely serve most of the sentence set to begin Jan. 6, said Officer Bill Cassell, a Las Vegas police spokesman.
Mayweather and his manager, Leonard Ellerbe, declined comment outside the courtroom.
The jail time raises doubts about a possible showdown between Mayweather and Manny Pacquiao, a champion fighter from the Philippines against whom Mayweather’s welterweight success is usually measured.
A long-awaited fight between the two men regarded as among the best of their generation has been delayed by stalling techniques and verbal sparring.
The two men have a defamation lawsuit pending in Las Vegas federal court stemming from statements by Mayweather that he suspects Pacquiao was taking performance-enhancing drugs.
Mayweather returned in September from a 16-month layoff to continue his undefeated record with a controversial knockout of Victor Ortiz in Las Vegas.
Mayweather’s promoters have a May 5 date reserved against an as-yet unnamed opponent at the MGM Grand Garden Arena. But if Mayweather is jailed until the end of March, it could cut into the usual eight-plus weeks he takes to train.
Keith Kizer, executive director of the Nevada Athletic Commission, said licenses for all fighters expire on Saturday, and most, including Mayweather, have yet to reapply for next year.
He said Mayweather would be asked on his license application if he was convicted of any misdemeanors or felonies.
Kizer said commissioners would then decide whether to approve or deny his license or hold a hearing to talk about it. The commission has been in contact with prosecutors and Mayweather’s lawyers as cases against him have progressed, he said.
Lee Samuels, a spokesman for Pacquiao’s promoter Top Rank and Bob Arum, declined comment on Mayweather’s sentencing and its possible effect on a match.
Mayweather, 34, stood still in a striped olive vest and showed no reaction as the judge sentenced him to six months in the Clark County jail then suspended half the term.
She gave him credit for three days previously served in jail and ordered him to complete 100 hours of community service, pay a $2,500 fine and complete a yearlong domestic violence counseling program.
The plea deal avoided trial on felony and misdemeanor that could have gotten Mayweather 34 years in state prison if he was convicted on all counts.
Mayweather also is expected to plead no contest next week to a separate misdemeanor harassment charge involving a 21-year-old homeowner association security guard who was poked in the face during an argument about parking tickets placed on cars outside Mayweather’s house.
Mayweather’s lawyer, Karen Winckler, said she may appeal what she called the unusual sentence handed down Wednesday.
In court, she called Mayweather “a champion in many areas” and aired a list of his good deeds, including buying toys for children for Christmas and promising to donate $100,000 to breast cancer research by the end of December.
