The 38-year-old's has spent 19 years at Taunton across two spells and departs following a stellar career
Somerset have confirmed that all-rounder Peter Trego will leave the club at the end of the season.
The 38-year-old is only on a white-ball contract at Taunton and the decision has been taken not to extend that deal.
Since making his debut for the club in 2000, Trego has emerged as a legendary figure across all formats and was part of the squad which won the One-Day Cup earlier this season
He becomes the latest stalwart to confirm his departure from Somerset, with Marcus Trescothick due to retire at the end of the campaign.
“I understand the club’s desire to give younger players an opportunity, and whilst I’m no longer going to be a Somerset player, I will always be a Somerset fan," Trego, who has also represented Kent and Middlesex, said.
“It’s been a long and fantastic journey. I’ve got so many wonderful memories, but that final one-day game at Lord’s has to stand out. Walking around the ground with the trophy and long-standing teammates such as Hildy was the icing on the cake of what’s been a great time in my life.
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“The positive memories that we’ve all shared together will stay with me forever. I’m not just talking about the players either."
Director of Cricket, Andy Hurry added: "He lived to play for the club, and there is no doubt in anyone’s mind that he is Somerset through and through.
"There are so many great memories of his contributions to the club over the years and one I will never forget is his 54-ball century against Yorkshire to help us chase down 476 to win the Championship match at Taunton in 2009. At the time, Pete described that as ‘the innings of his life’.
“This year we have seen the emergence of several young players and this has meant that Pete’s opportunities in the First XI have been limited.
"He obviously wants to be playing first-team cricket, which is not something that we can guarantee him here at the moment, and therefore we feel that it is in both the club’s and Pete’s best interests for him to consider other opportunities."