The 37 year-old hit the scales at 151 and one-half pounds, his lightest since moving up from welterweight as far back as 2009.
His opponent, Sadam Ali – a predominant 147 pounder himself, scaled 153 for his debut at the limit.
Saturday’s HBO World Championship Boxing® telecast begins at 10:00 p.m. ET/PT.
Opening the telecast from Madison Square Garden in New York City is Rey Vargas defending his title against Oscar Negrete in a 12-round super bantamweight fight.
In the main event of the evening, future hall of famer Cotto defends his WBO junior middleweight title in a 12-round battle against challenger Ali.
Official Weights from New York City:
Miguel Cotto: 151.6 lbs.
Sadam Ali: 153.0 lbs.
Rey Vargas: 121.4 lbs.
Oscar Negrete: 121.2 lbs.
Join the conversation on Twitter: #CottoAli
