1) Manny Pacquiao
2) Canelo Álvarez
3) Gennady Golovkin
4) Floyd Mayweather
Explanation:
Filipino professional boxer, Manny Pacquiao (40) claimed the WBA (World Boxing Association) welterweight championship 2019 by defeating Keith Thurman of US at the MGM Grand Garden Arena, United States. Two judges scored it 115-112 in favour of Pacquiao, while one judge scored it 114-113 to Thurman.The eight-division world champion Pacquiao has improved to 62-7-2 score with 39 knockouts.Currently serves as a senator of the Philippines, he has won 12 major world titles as well as being the first boxer to win the lineal championship in five different weight classes.