Filipino boxing superstar Manny Pacquiao, who is facing Shane Mosley on May 7 at the MGM Grand Garden Arena in Las Vegas, Nev., has recently posted his 13th straight victory after disposing Antonio Margarito last Nov. 13.
Pacquiao is gunning for his straight 14th win when he faces Shane Mosley on May 7. His winning streak spans close to six years after he lost to Erik Morales of Mexico in 2005.
Since losing to Morales, Pacquiao had five TKO victories, four unanimous decisions, three KO's and one split decision.
Pacquiao is the first boxer in history to win eight different belts in as many weight classes after winning over Antonio Margarito in the super welterweight division.
After winning over prime boxers such as Barrera, Marquez, Diaz, Larios, Velasquez and Morales, the reigning pound-for-pound king fought the so-called "Goliaths" of the welterweight division including De La Hoya, Hatton, Cotto, Clottey and Margarito.
Pacquiao's winning streak is more significant as he fought and won over much more superior boxers in terms of physical attributes such as weight, reach and height.
But Pacquiao's winning streak in terms of the number of years spent without a single loss is eclipsed by the track record of great boxers in the last five decades.
Some of the famous boxers with impressive winning streaks include, among others, the following boxing legends.
Julio Cesar Chavez
This Mexican boxing legend had the longest winning streak from 1980 to 1993, winning all of his professional fights for the 13-year period.
In 1994, he lost to Frankie Randall after posting close to 90 consecutive wins in the last 13 years.
In 2005, Chávez suffered a TKO loss to little-known Grover Wiley in the 115th bout of his career, retiring in his corner before the start of the fifth round after injuring his right hand.
After the bout, Chávez told his promoter Bob Arum that this time he was definitely retiring from boxing.
Chavez fought 115 times during his professional career, winning 107 times with six losses and two draws.
British boxer Joe Calzaghe, who remained undefeated until his retirement in 2009, had an impressive winning streak over 15 years.
Calzaghe fought 46 times without a single loss in his professional career, spanning 15 years. He won 32 times via KO.
Roy Jones had a winning streak of 14 years, though he had one disqualification when he fought Montell Griffin in 1997 for hitting his opponent while he was down.
Jones had 61 fights, winning 54 and losing seven.
Floyd Mayweather, Jr.
Like Joe Calzaghe, Floyd Mayweather Jr. has been winning all his fights since he turned professional in 1996.
Mayweather has an enviable winning streak of 14 years and has remained undefeated in his entire professional boxing career with 41 fights to his credit.
Muhammad Ali's longest winning streak dates from 1960 until 1970, a decade of uninterrupted wins numbering 30 with TKO's and KO's accounting for 75 percent of his wins.
Ali's winning streak ended in 1971 when Joe Frazier beat him via unanimous decision in what is known as "The Fight of the Century."
After his first loss to Frazier, Ali won 10 consecutive times until he lost to Ken Norton in 1973 via split decision.
Ali fought 61 times, winning 56 and losing five. He won 37 fights via KO.
As Pacquiao aims for his 14th straight victory on May 7, and with Bob Arum's announcement of Pacquiao's plan to fight actively until 2013, it is doubtful the Filipino boxing icon will match or even approximate the impressive winning records of some of these boxers when he finally retires in three years.