Donovan was named the most valuable player of his 14th MLS All-Star game on Wednesday night in Portland, scoring a goal in the All-Stars' 2-1 win over Bayern Munich. He has been a key component of MLS' impressive growth during his 14 years in the top North American league, choosing to pursue a pro career in his native California instead of Europe.
Donovan, a five-time MLS champion with the Galaxy and the San Jose Earthquakes, agreed to a multiyear contract extension with the Galaxy just a year ago, pronouncing himself revitalized after an extended sabbatical. He took several months off following the Galaxy's second straight MLS Cup title alongside now-retired David Beckham in December 2012.
"After spending half my life as a professional soccer player, I also am excited to begin a new chapter and pursue other opportunities that will challenge me and allow me to grow as a person," Donovan said.
Donovan was not included on his fourth U.S. World Cup team this summer. He was surprised and disappointed by coach Jurgen Klinsmann's decision, feeling he had done enough in training camp to warrant inclusion.
"Quite simply the best player ever to wear the USMNT jersey," U.S. Soccer Federation President Sunil Gulati posted on his Twitter account.
Donovan is the career U.S. leader with 57 international goals over 156 appearances, and he has scored five World Cup goals, including his famed stoppage-time goal against Algeria four years ago to send the Americans to the second round. He watched the American team in Brazil from afar as a television commentator.
"As we enter a transformative time for the sport, I will do everything I can to help the continued growth of soccer in the United States," Donovan said.
"I look forward to making a difference, pursuing my passions and meeting all of you along the way in this next phase of my life."
Donovan has played for the Galaxy since 2005, also going on loan to Everton and Bayern Munich during the Galaxy's offseason.