Back on September 17, 1999, at Pakpangag Metropolian Stadium in Thailand, Medgoen Singsurat became the last man to drop and knockout Manny Pacquiao. It came off a body shot, too.
Medgoen Singsurat came into the fight undefeated in his last 13 contests (and currently has a record of 74 wins against six losses with 51 KOs). Pacquiao had one previous knockout loss on his record to Rustico Torrecampo (who is also still fighting and has a record of 15 wins against eight losses).
Manny Pacquiao began his professional boxing career in 1995 at age 16, standing 4'11", and weighing 98 pounds. Being seven shy of the minimum weight division at that time, he placed weights in his pockets to make the 105-pound weight limit for his first fight.
From there, Pacquiao moved up to 113 pounds before dropping his 12th fight against Rustico Torrecampo. One odd fact about that fight is that since Pacquiao had failed to make weight against Torrecampo, he was forced to wear heavier gloves in an attempt to handicap him.
After that, Pacquiao fought on and remained undefeated for 15 straight fights.
Then Pacquiao squared off against Medgoen "The 3K Battery" Singsurat and was stopped by a flush righthand to the body.
Floyd Mayweather has mentioned these two knockout losses on Pacquiao's record frequently whenever talk has turned to the Pacquiao-Mayweather superfight. Beyond Pacquiao looking almost unrecognizably young and smaller in the clips, his style and lack of confidence in the ring is even more startling.
See for yourself how far Pacquiao has come in such a relatively short period of time.
If you can believe it, it was only four years after suffering his loss to Singsurat that Pacquiao blew out Marco Antonio Barrera.
That was the first fight I ever saw of Manny Pacquiao. By the look on Barrera's face that night, I wasn't alone in wondering where on earth a fighter like Pacquiao had come from. I'd never seen anything quite like it.