The 33-year old former Canada international has decided to call time on a career which lasted almost a decade and allowed him to play in four different countries.
Friend, who joined the Galaxy in January this year, said he was thrilled to be ending his playing days having won the 2014 MLS Cup with the Los Angeles club.
"I'm extremely grateful to have played the game I love for a living," Friend said in a statement.
"I have been fortunate enough to work with some outstanding teammates, coaches and clubs who have helped shape me on and off the field over the past 10 years.
"I will always be thankful for the experiences, relationships and opportunities the game itself has given me and am honored to finish my career as an MLS champion with the Galaxy."
During his career, Friend played for Norwegian clubs Moss and Molde, Dutch pair Heerenveen and Heracles Almelo, German teams Borussia Monchengladbach, Hertha Berlin, Eintracht Frankfurt and 1860 Munich. He also made 31 international appearances for Canada.
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