Manny Pacquiao, at one point the best pound-for-pound fighter in the world, will try to get his career back on track in November when he takes on Brandon Rios in China. In advance of that bout, here's a look at some of Pacquiao's biggest fights. SI NOW: Manny Pacquiao on why Mayweather fight hasn't happened
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Juan Manuel Marquez IV
In his fourth meeting with Juan Marquez, Pacquiao was knocked outing the sixth round, marking the first time in his career he'd lost consecutive bouts.
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In a controversial split decision ruling that even the WBO itself said should have gone the other way, Pacquiao was robbed of a win over Timothy Bradley. The judges at ringside scored it 115-113, 113-115, 113-115, which most media observers had Pacquiao winning by a large margin.
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Juan Manuel Marquez III
Pacquiao showed great heart down to the stretch to rally for a majority-decision victory over the ageless Marquez, who entered as a 7-to-1 underdog despite narrow points losses to the Filipino in 2004 and '08. One ringside judge scored it 114-114, with the other two giving it to Pacquiao at 115-113 and 116-114. (SI.com had it 114-114.)
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Pacquiao wasn't up to his near-perfect standard, but he still dominated the 39-year-old Mosley over 12 rounds for a unanimous-decision win. Trainer Freddie Roach said Pacquiao, who was involved in a fight-day fender bender, was beset by leg cramps during the fight. Mosley suffered just the third knockdown of his career in the third round and, by the end of an uninspiring fight, was being booed by the Vegas crowd.
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Pacquiao outpointed Margarito for the vacant WBC super welterweight championship before 41,734 fans at Cowboys Stadium. The victory gave the Filipino an eighth world title in eight different weight classes (from 112 to 154 pounds).
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Pacquiao overwhelmed Clottey from wire to wire in his first defense of the WBO welterweight title before 50,994 fans at Cowboys Stadium. It marked the first boxing event at Jerry Jones' $1.3 billion palace. Only two fights in the United States during the past 50 years drew more fans: Muhammad Ali-Leon Spinks II at the New Orleans Superdome in 1978 (63,350) and Pernell Whitaker-Julio Cesar Chavez at San Antonio's Alamodome in 1993 (59,995).
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With his 12th-round knockout victory over Cotto for the WBO welterweight title -- in a bout fought at a catch-weight of 145 pounds -- Pacquiao became the first boxer to win titles in seven divisions.
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With a spectacular second-round knockout of Hatton in Las Vegas, Pacquiao bagged the lineal junior welterweight title (140 pounds) and became the second fighter in history to win titles in six divisions along with De La Hoya.
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Oscar De La Hoya
Pacquiao's transition from boxing notable to crossover superstar was crystallized with a dramatic ninth-round TKO of De La Hoya in a non-title fight at the MGM Grand Garden Arena in Las Vegas. While De La Hoya was considered past his prime, many believed the climb to the welterweight limit (147 pounds) would prove too imposing for Pacquiao. They were wrong. The Filipino peppered the Golden Boy all night long with punches from all angles, until De La Hoya quit on his stool after the eighth round ... and quit boxing shortly thereafter.
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Pacquiao became a five-division champion with a ninth-round knockout of Diaz for the WBC lightweight title (135 pounds). He'd vacate the super featherweight title in July while mulling another move up in weight.
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Juan Manuel Marquez II
Fighting for the WBC super featherweight title (130 pounds), Pacquiao outpointed Marquez in a narrow decision -- a crucial third-round knockdown making the difference. The victory gave Pacquiao the world title in a fourth weight class.
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Marco Antonio Barrera II
In the long-awaited rematch with Barrera at super featherweight, Pacquaio won a lopsided unanimous decision at the Mandalay Bay in Las Vegas.
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Erik Morales III
Morales bravely tried to stand toe-to-toe with Pacquiao in the highly anticipated rubber match, but the strategy proved ill-advised. Pacquiao put an exclamation point on the trilogy with a third-round knockout of the Mexican warrior.
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Erik Morales II
The rematch between Pacquiao and Morales lived up to advance billing through nine grueling rounds. It ended in the 10th, when Pacquiao avenged the previous year's defeat with a knockout of Morales -- the first of his career.
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Erik Morales I
Moving up to super featherweight (130 pounds) for a showdown with Mexico's legendary three-division champion -- the first installment of an epic trilogy -- Pacquiao suffered a cut from an accidental butt in the fifth round and lost a unanimous decision.
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Juan Manuel Marquez I
With designs on unifying The Ring featherweight title with Marquez's WBA and IBF belts, Pacquiao faced the Mexican legend at the MGM Grand in Las Vegas. Marquez went down three times in Round 1, but showed unforgettable heart and resiliency in storming back to force a controversial draw.
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Marco Antonio Barrera I
With an 11th-round TKO of Barrera at the Alamodome, Pacquiao captured the lineal featherweight championship and cemented his stardom among American fight fans. It marked Pacquiao's third title in three weight classes.
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