Besides the boxer has also been credited with four champion wins which include,
Early on his eleventh and twelfth pro bouts, Pernell defeated former world champion Alfredo Layne on December 20, 1986, and former WBA and lineal Super Featherweight and WBC Light Welterweight titleholder Roger Mayweather on March 28, 1987.
Undisputed Lightweight Champion
Whitaker trudged on, winning a decision over Greg Haugen for the IBF Lightweight title on February 18, 1989, becoming the first boxer to knock Haugen down by dropping him in the sixth round.
IBF Light-Welterweight Champion
In 1992, he began his ascent in weight, winning the IBF light welterweight title from Colombian puncher Rafael Pineda on July 18.
WBC and Lineal Welterweight Champion
On March 6, 1993, he decisioned James McGirt to become the Lineal and WBC Welterweight Champion.