LONDON, Oct 11 (Reuters) - U.S. soccer team Sporting Kansas City plan to retain their Livestrong stadium name despite its link to doping-tainted cyclist Lance Armstrong, chief executive Robb Heineman said on Thursday. Under an unusual stadium naming deal signed in 2011, the club agreed to donate $7.5 million over six years to the Livestrong Foundation cancer charity set up by the American rider after his successful treatment for the disease. ... More...