LJUBLJANA, Slovenia -- Olympic and world hammer throw champion Primoz Kozmus announced his retirement Thursday, while leaving open the possibility of a return.
In a column published in the leading daily Delo, the 30-year-old Slovenian said he and his coach realized "great ones leave when they are at their best."
"I want to go on, to beat the world record, but I have no strength for such a feat," Kozmus wrote. "I've reached my peak. It is time to say goodbye. Olympic and world champion is enough, I cannot do more ... Goodbye!"
Kozmus is the first hammer thrower to follow up the Olympic title with a win at the worlds, winning gold at the 2008 Olympics in Beijing and the world championships in Berlin this summer.
He reached his record of 270 feet, 11 1/4 inches in September -- still far from his ambition of beating the world record of 284-7, set by Yuriy Sedykh in Stuttgart in 1986.
Kozmus added that he will still "do some thinking" and "make the final decision" (on retiring) in the spring.
"At the moment, I'm determined to say goodbye," he said.