The 36-year-old started his career at Charlton, before moving to Chelsea for £10m in January 2004.
The midfielder enjoyed four seasons in East London between 2007-11, making 129 appearances, scoring 12 goals.
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“Thank you to the fans of all of the clubs that I’ve been lucky enough to play for. Your support has meant everything to me and you’ve supported me throughout all of the ups and downs during my career. I hope I was able to repay the faith shown in me by my commitment and performances on the pitch.
“I would like to thank all of my teammates over the course of my career as well as the coaches and managers that I’ve played under. I’ve learnt a huge amount from everyone that I’ve worked with that I have no doubt will hugely benefit me in my next career chapter.
“When was a boy I dreamt of becoming a professional football player and I feel very honoured to have accomplished my dream. I have always tried to set high standards on and off the pitch. I hope most of all throughout my career I have been a good role model not only to my sons but also to all of my teammates who played with me as well as all those who supported me.”
Read more at http://www.whufc.com/news/articles/2017/june/28-june/three-time-hammer-year-scott-parker-announces-retirement#BvYIP424Sw6E0qVX.99