Lightweight title challenges

On April 30, 1980, Mancini defeated Bobby Sparks with a knockout at 1:28 in the first round for the regional Ohio State Lightweight title. Over a year later on May 16, 1981, Mancini won his first major title by defeating Jorge Morales for the WBC-affiliated NABF Lightweight championship when the referee determined that Morales could not continue after the 9th round. In the post-match interview, Ray said that he was "keeping this title for myself because the world title is going to my dad". Two months later, he successfully defended the title against José Luis Ramírez after a unanimous decision. Mancini's first attempt at a world title came on October 3 when he was pitted against Alexis Argüello for his World Boxing Council lightweight title. The event was selected by many (including The Ring and ESPN) as one of the most spectacular fights of the 1980s. Mancini gave Argüello trouble early and built a lead on the scorecards, but Argüello used his experience to his advantage in the later rounds and stopped Mancini in the 14th round.

Mancini would rebound from the loss to Argüello by winning his next two bouts, including a second successful defense of his NABF Lightweight title against Julio Valdez (10th-round TKO) which would earn him another chance at a world title.

WBA Lightweight champion

On May 8, 1982, in a match held at The Aladdin in Las Vegas, he challenged the new World Boxing Association lightweight champion, Arturo Frias.^[7] Fifteen seconds into the fight, Frias caught Mancini with a left hook to the chin and another combination made Mancini bleed from his eyebrow. Mancini recovered and dropped Frias right in the center of the ring with a combination. Dazed, Frias got backed up, and Mancini immediately went on the offensive and trapped Frias against the ropes. After many unanswered blows, referee Richard Greene stopped the fight at 2:54 in the first round, and the Mancini family finally had a world champion.^[1]

Mancini's first title defense, against former world champion Ernesto España, went smoothly with a Mancini knockout win in the 6th round.

Match against Duk Koo Kim

On November 13, 1982, a 21-year-old Mancini met 27-year-old South Korean challenger Duk Koo Kim. Kim had struggled to make the 135-pound (61 kg) weight limit, and had to lose several pounds shortly before the fight. The title bout, at Caesars Palace in Las Vegas, was televised live on CBS Sports. Mancini won by TKO in the 14th round. Moments after the fight ended, Kim collapsed and fell into a coma, having suffered a subdural hematoma, and died five days later.^[8] The week after his death, the cover of Sports Illustrated magazine showed Mancini and Kim battling, under the title "Tragedy in the Ring".^[9]

Mancini went to the funeral in South Korea and fell into a deep depression afterwards.^[4] He has said that the hardest moments came when people approached him and asked if he was the boxer who "killed" Duk Koo Kim. Mancini went through a period of reflection and blamed himself for Kim's death. In addition, Kim's mother died by suicide three months after the fight, and the bout's referee, Richard Green, killed himself in July 1983.^[10]

As a result of Kim's death, the WBC took steps to shorten its title bouts to a maximum of 12 rounds. The WBA and WBO followed in 1988, and the IBF in 1989.^[10]

Later title defenses

Following Kim's death, Mancini took a brief hiatus, canceling a planned title defense scheduled for the following month against Roberto Elizondo in Italy. He returned to boxing in early February 1983, defeating George Feeney in a non-title bout held in Italy.^[11]

Mancini's next title defense took place in Madison Square Garden on September 15, 1983 against Orlando Romero, which Mancini won via ninth-round knockout.^[12] His final successful defense came against two-division world champion Bobby Chacon on January 14, 1984. Mancini dominated Chacon before knocking him out in the third-round in what would prove to be the final victory of his professional career.^[13]

Fights against Livingstone Bramble

In June 1984, Mancini, still recovering from the emotional trauma of Kim's death, fought Livingstone Bramble to defend his title in Buffalo, New York. This time however, Mancini came out on the losing end, defeated after 14 rounds.^[14] Mancini lost the title, but not before a fierce effort that resulted in an overnight stay at Millard Fillmore Hospital and 71 stitches around one eye.^[15]

Mancini returned to the ring twice to attempt to regain his world title. In a rematch with Bramble, Mancini lost the fight by one point on all three judges' scorecards in a 15-round decision.^[16] His next attempt came in March 1989, when he lost to Héctor 'Macho' Camacho in a split decision,^[17] Mancini had one final fight in April 1992, against former lightweight champion Greg Haugen. Mancini lost when referee Mills Lane stopped the fight in the seventh round.^[18]