One of the Galaxy's longest tenured players having joined the club in June 2007, Klein ranks fifth in MLS history with 332 career regular season games played, having scored 49 goals and added 69 assists with three different clubs. Klein will play the final regular season game of his career on Sunday when the Galaxy host FC Dallas in their regular season finale at The Home Depot Center.
He will remain with the club through the postseason, where he will look to help the Galaxy win their first MLS Cup championship since 2005.
"The decision to step away from the game after 13 years is a difficult one, but one that I am ready for," Klein said.
"I have had an amazing journey in MLS. I've had the ability to play with hundreds of teammates and for some of the best coaches that this league has ever produced, and I was able to forge relationships with them that extend beyond the soccer field. I am grateful for the opportunity to be able to play in front of some incredible fans in Kansas City, Salt Lake and now here with the Galaxy; and those are the people that I will really miss."