HULST, Netherlands — Kenyan runner Felix Limo, who won both the London and Chicago marathons, has retired from the sport because of recurrent back injuries. The 32-year-old Limo says his injuries are preventing him from running quick times and training at the “intensity ... that I was able to do seven or eight years ago.” Limo was the world's fastest marathon runner in 2004, winning races in Rotterdam and Berlin. He won four out of his five marathons between 2004-06 with a best time of 2 hours, 6 minutes, 14 seconds. Limo says “I feel confident I could still run marathons in 2:09 or 2:10.” — AP
