Tyson made his professional debut on
March 6 1985, in
Albany, New York. He defeated Hector Mercedes with a first round
knockout. Fighting frequently in his first two years as a professional, Tyson won 19 of his first 22 fights by knockout, 14 of which came in the first round. The quality of his opponents gradually increased to journeyman fighters and borderline contenders, and his win streak attracted media attention, leading to his being billed as the next great
heavyweight champion. D'Amato died in November 1985, relatively early into Tyson's professional career; some speculate that his death was the genesis of many of the troubles Tyson was to experience later as his life and career progressed.
Tyson's first nationally
televised bout took place on
February 16, 1986, at
Houston Field House in
Troy, NY against journeyman heavyweight
Jesse Ferguson. Tyson knocked down Ferguson with an uppercut in the fifth round that reportedly broke Ferguson's nose. During the sixth round, Ferguson began to hold and clinch Tyson in an apparent attempt to avoid further punishment. After admonishing Ferguson several times to obey his commands to break the clinches and box, the
referee finally stopped the fight near the middle of the sixth round. Initially ruled a win for Tyson by disqualification (DQ) of his opponent, the ruling was subsequently "adjusted" as a win by
technical knockout (TKO) after Tyson's corner protested that a DQ win would end Tyson's string of knockout victories, and that a knockout would have been the inevitable result. The rationale offered for the revised outcome was that the fight was actually stopped because Ferguson could not (rather than would not) continue boxing.
On
November 22 1986, Tyson was given his first title fight against
Trevor Berbick for the
World Boxing Council (WBC) heavyweight championship. Tyson won the title by second round TKO, and at the age of 20 years and 4 months became the youngest heavyweight champion in history.
Floyd Patterson had been the youngest heavyweight champ to that time, at the age of 21 and 10 months, having won the title by beating Archie Moore in an elimination series following the retirement of
Rocky Marciano. Muhammad Ali holds the record as the second youngest man to take the lineal title from the reigning undisputed champion (
Sonny Liston) in the ring.
At age 20, Tyson was around 220 lb (100 kg) with approximately 5.5% body fat, and was stocky for his height of 5 ft 11½ in (180 cm). Because of Tyson's strength, many fighters were said to be too intimidated to hit him and this was backed up by his above-average hand speed, accuracy, coordination, power, and timing. Tyson was also noted for his defensive abilities. Holding his hands high in the
Peek-a-Boo style taught by his mentor
Cus D'Amato, he slipped and weaved out of the way of the opponent's punches while closing the distance to deliver his own punches.