Former welterweight and super lightweight champion Marcos Maidana (35-5, 31 KO) announced his retirement at the age of 33.

Maidana is probably most well known for his last two fights, both decision losses to Floyd Mayweather Jr. in 2014. Many believe that his first fight against Mayweather was, arguably, the now retired undefeated Mayweather's toughest in his career.

The 33-year-old began his pro career in 2004, but hasn't fought since his second fight against Mayweather. In a social media post addressed to "boxing friends," Maidana said that he has hinted at retirement as of late, but this time, it is official. Credit to Boxingscene.com for translating the full announcement.

"After a long time out of the ring and after giving it a lot of thought since my last fight I've decided to hang up the gloves for good," Maidana wrote. "Probably my decision would not surprise much as I had given hints of it in the last few months. But at this time I am making it official."

He cited a lack of motivation to get back in the ring as the reason he retired, but he was quick to say that the lack of motivation was not present while he was in the ring

"Only through a great physical and mental effort you can mix in the ring with best of the world if winning is your goal. And I always wanted to win," Maidana wrote. "Today I do not feel motivated enough, do not have the fire inside me to intend to climb those mountains again. That is why I announce my retirement. At this time when I take a look back at my career I want to thank so many people that helped me to have what I call a successful career."

Maidana has notable victories over Victor Ortiz, Erik Morales and Adrien Broner and notable close losses to Devon Alexander and Amir Khan.

The Argentine boxer said that he will remain close to the sport, helping featherweight titleholder Jesus Cuellar, prospects Brian Castaño, Alan Castaño and Maidana's brother Fabian, among others, reach the same heights that the newly retired Maidana achieved.

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