The 43-year-old opening batsman, who played 76 Tests and 123 one-day internationals for England, has a tally of 5825 runs in Test matches and 4335 ODI runs.

"It's been an incredible 27 years and I've loved every minute of it. However, everything has to come to an end eventually. I’ve been discussing my future with the club and my family for a while and we felt that now was the appropriate time to make this announcement in order for both the club and I to put plans in place. There's still a lot of the season left and I'll be doing everything I can to put in performances for the second XI in order to force my way back into contention for the first team," Trescothick was quoted by the Somerset website. 

"Twenty-seven years is a long time but it's gone incredibly quickly. I consider myself very fortunate to have had the opportunity to do something that I love for that length of time. I'm extremely grateful for all the support that I've received throughout this remarkable journey," Trescothick added.