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United States' Conor Dwyer, left, Michael Phelps, center, Ryan Lochte, second right, and Ricky Berens, right, pose with their gold medals after their win in the men's 4 x 200-meter freestyle relay at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Tuesday, July 31, 2012. (AP Photo/Daniel Ochoa De Olza)
Winnetka's Conor Dwyer won his first gold medal Tuesday and became a part of history as teammate Michael Phelps become the most decorated Olympian of all time.
"I'm a little bit shocked. I didn't know what to expect coming into it. It was amazing that I made it and it's just been an unbelievable experience. Winning gold -- I couldn't ask for a better first Olympics," Dwyer said shortly after climbing out of the pool.
Phelps earned a record 19th career medal -- his 15th gold -- with a first-place finish in the 4x200 freestyle relay. Phelps anchored the race alongside teammates Ryan Lochte, Dwyer and Ricky Berens. Lochte built up a big lead early in the race that held for the rest of the race.
"A special night. A special feeling, and it's time to get some rest for some other events," he said after the race. "I have another race tomorrow morning."
Dwyer called Phelps "the best swimmer of all time."
Earlier Tuesday, Phelps barely missed a gold in the 200m butterfly, but earned a silver that tied the record for most decorated Olympic athlete -- sharing the honor with gymnast Larisa Latynina. Latynina racked up her 18 under the flag of the former Soviet Union.
After South Africa's Chad le Clos edged Phelps at the wall for the gold in the 200m butterfly, Phelps flipped his cap in disgust and buried his face in his hands. Japan's Takeshi Matsuda took the bronze.
Earlier American Allison Schmitt won the gold in 200m free. Her 1:53:61 performance was an Olympic record. Camille Muffat of France took the silver and Bronte Barratt of Australia won bronze. American phenom Missy Franklin, who was hoping for her third medal of the Games, instead placed fourth.