Michael Phelps of the US swims to win the men's 200m freestyle final at the National Aquatics Center during the Beijing 2008 Olympic Games August 12, 2008. It is Phelps' third gold medal at the Beijing Games, also the 9th gold of his Olympics career. [Agencies]

After a six-gold performance at the 2004 Athens Games, Phelps needed only five days in Beijing to surpass Spitz, Lewis, Soviet gymnast Larysa Latynina and Finnish runner Paavo Nurmi as the winningest Olympian ever.

"I'm almost at a loss for words," Phelps said. "Growing up I always wanted to be an Olympian. Now to be the most decorated Olympian of all time, it just sounds weird saying. It started setting in a little bit after the butterfly. I was just trying to focus on my next race, but I just kept thinking, `Wow, greatest Olympian of all time.' It's a pretty cool title. I'm definitely honored."

Phelps has three more chances to stretch his lead before he leaves China. He'll swim in the 200 individual medley, 100 fly and 400 medley relay.

"There is still something left in the tank," Phelps said. "I've got three races left, so there had better be something left in the tank."

In his signature stroke, the butterfly, Phelps was second at the first flip, then pushed it into another gear, his long arms gobbling up huge chunks of water as he literally sailed along atop the surface. He finished in 1:52.03, breaking his mark of 1:52.09 from the 2007 worlds.

Phelps barely smiled as he looked at the board, breathing heavily and hanging on the lane rope. Hungary's Laszlo Cseh really pushed it at the end, but settled for silver in 1:52.70. Japan's Takeshi Matsuda took the bronze in 1:52.97.