Tyson turned professional in March 1985, tearing through opponents with frightening efficiency. Over his first calendar year, he fought 15 times, winning all by stoppage, often inside the first two minutes. His head movement, defensive slipping, and rapid combinations stunned seasoned boxing critics who were used to slow, towering heavyweights.
Tragedy struck in November 1985 when D'Amato died of pneumonia at age 77. The loss devastated the young fighter, stripping away the central moral compass of his life. Despite his grief, Tyson continued his ascent under trainer Kevin Rooney and manager Bill Cayton. On November 22, 1986, Tyson faced WBC champion Trevor Berbick in Las Vegas. Tyson knocked Berbick down twice in the second round, leaving the champion stumbling around the ring on jelly legs.
At 20 years, 4 months, and 22 days old, Tyson eclipsed Floyd Patterson's record to claim the heavyweight championship. Over the next two years, he dismantled James "Bonecrusher" Smith, Pinklon Thomas, and Tony Tucker to unify the WBC, WBA, and IBF titles, becoming the undisputed world heavyweight king before his 22nd birthday.
