Somerset opener Arul Suppiah has been forced to retire from professional cricket with immediate effect on medical advice.
The 29-year-old has not been able to overcome serious injuries to both knees, and the problem has "rapidly deteriorated" this season.
The Malaysian-born player has spent 13 years with Somerset, and his loyal service was rewarded with a benefit season this summer.
Suppiah established himself as a first-team regular in 2005 and was an ever-present in first-class cricket for the county in both the 2011 and 2012 seasons.
He has forged an impressive opening partnership with Marcus Trescothick, although Suppiah also holds the world record for the best bowling figures in Twenty20 cricket - claiming a remarkable 6-5 against Glamorgan in 2011.
Suppiah, who scored over 10,000 first-class runs with a best of 156 against India two years ago, said: "I am devastated to have to retire from the game that I have always loved.
"This is the hardest decision of my life especially having played for Somerset for so long. After consultation with the specialist, I realise I have no choice but to retire.
"I have so many happy memories of my time at Somerset and would like to thank everybody from players, staff and members who have supported me during my playing career at the County.
"Somerset will always be my County and from the other side of the boundary ropes I shall continue to support the lads in every way I can."
Somerset chief executive Guy Lavender said: "Arul has given so much to cricket in Somerset and it is a great shame that he has to retire in these circumstances.
"Not only is he an exceptional cricketer, he is a superb chap and I am certain that the next phase of his career will be as successful as the first.
"I am sure that all Somerset Members and cricket lovers will continue to support his remaining benefit year events.
"Arul will be greatly missed by all the players and staff and we would like to thank him on behalf of all the members for everything that he has done for Somerset and wish him every success for the future."