Kerry O'Keeffe has announced he is retiring from cricket commentary after 13 years with the ABC.

An emotional O'Keeffe said on Friday the fifth Ashes Test in Sydney, starting next Friday, would be his last behind the microphone after what he described as a "life changing" broadcasting career.

Former Australian Test cricketer Kerry O'Keeffe is retiring from the commentary box. Credit:Angela Milne

"I didn't have a bean when I started," the 64-year-old said. "I was virtually unemployed. I'd just drifted, doing casual jobs...but my life changed, and suddenly I was making money. A lot of things sprung from it. I wrote three books that sold and my speaking (engagements). I've been able to secure my family."

O'Keeffe's quick-wittedness and his distinctive laugh have made him an institution on the airwaves since he signed up with the public broadcaster. He announced his impending retirement during the afternoon call of the second day of the fourth Test.