Los Angeles Galaxy forward Landon Donovan, widely considered as America's best ever footballer, announces will retire at the end of the MLS season, at a news conference at StubHub Center in Carson, Calif., Thursday, Aug. 7, 2014. The 32-year-old is the top goal scorer in MLS history and a five-time league champion. (AP Photo/Nick Ut)CARSON, Calif. (AP) — A 12 months after Landon Donovan back to soccer, he realized he had lost his ardour for the sport once more. This time, the perfect participant in American history made up our minds to walk away for good.