McWilliams Arroyo (born December 5, 1985) is a Puerto Rican boxer best known for winning the Gold Medal at flyweight at the 2009 World Amateur Boxing Championships at Assago forum in Milan on September 12, 2009 and in the 2007 PanAmerican games. He is the twin brother of boxer McJoe Arroyo, they are the second twins to qualify for the Olympics in boxing.
At the 2006 Central American Games he beat Olympic Champion Yan Barthelemy 14-11, and won Gold at Light flyweight.
In Chicago at the 2007 World Amateur Boxing Championships he defeated Lusvanteseren Zorigtbaatar (Mongolia), Vitaliy Volkov (Ukraine) and Bato-Munko Vankeev (Belarus) to qualify for the Olympics. He lost to Samir Mammadov in the quarterfinals, though, and didn't medal.
The Arroyo twins, McWilliams and McJoe, represented Puerto Rico in the 2008 Beijing Olympics after qualifying at the world championships. It was the second time that twins have competed in an Olympic boxing tournament after Wladimir and Valeriy Sidorenko fought in the 2000 Olympics. On July 2, 2008, Arroyo was selected to carry Puerto Rico's flag in the opening ceremonies of the Olympics. On July 8, 2008, Puerto Rico's Sports and Recreation Department offered up to $48,000 to the five boxers classified to the Olympics, if the boxers choose to continue with the team for a second Olympic cycle. In respect, Arroyo expressed that he would make his decision after comparing the offers provided by the government and professional promoters.
Arroyo won gold at the 2009 World Amateur Boxing Championships.
Olympic games results
2008 (as a flyweight)
World amateur championships results
2007 (as a flyweight)
- Defeated Luvsantseren Zorigtbaatar (Mongolia) 26-10
- Defeated Vitaliy Volkov (Ukraine) 23-14
- Defeated Bato-Munko Vankeev (Belarus) 23-17
- Lost to Samir Mammadov (Azerbaijan) 21-33 (quarterfinal match)
2009 (as a flyweight)
- 1st round bye
- Defeated Yoon Kyoung-Min (South Korea) RSCH 2
- Defeated Norbert Kalucza (Hungary) RSC 3
- Defeated Yampier Hernandez (Cuba) 6-2
- Defeated Ronny Beblik (Germany) 9-7
- Defeated Tugstsogt Nyambayar (Mongolia) 18-2
This article borrows from Arroyo's article on Wikipedia: 
|Height:||5'4" / 163 cm|
|Reach:||64" / 163 cm|
|Residence:||Fajardo, Puerto Rico|
|Birth Place:||Ceiba, Puerto Rico|