"As much as I'm proud of what I've achieved in my 20 years professional career - more than I ever could havedreamed of when I first entered the game - I have felt the drive to keep going harder to maintain in recent months," he wrote.
"My style of cricket has always been full noise, full throttle. From Culling Park to Lord's and everything in between, there have been some wonderful memories. Unfortunately, the sacrifices needed and commitment required to play that type of cricket have now become too great."
