Thirty years ago, Tom Green became the first Grand Slammer in ultra racing ... but now he's running a tougher race

In 1986, Tom Green ran four 100-mile races in one year to earn the first Grand Slam in ultra running. Since then, he's run hundreds of ultra marathons and remained active into his 60s. But a freak accident in 2015 has changed all that. My story about Tom for ESPN.com's Endurance Sports section: http://espn.go.com/sports/endurance/story/_/id/15059806/endurance-sports-freak-accident-keep-ultrarunning-legend-tom-green-down