Here in Hopkinton, Mass., this morning, 15 fewer runners – cheaters, actually — are gathering for the start of the Boston Marathon than would have otherwise, thanks to the cyber-sleuthing efforts of an Ohio business analyst.

Derek Murphy has made it his business to purge marathoning and, in particular, the Boston competition, of those who by hook, crook – or writing a check – seek to run as official entrants without having done the training to produce a legitimate qualifying time.

From a story posted Saturday in Runner’s World.

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