As /u/rakki linked, the fatass in question seems to be cutting the course short. For the past few years it has missed the timing mat at the 19.7 mile mark. As well, other competitors claim that they have noticed odd things like passing the lard barge multiple times in the same race. Not to mention, his time improved by about 90 minutes from the last year that he recorded a time at mile 19.7. If it was simply one of these, I might agree that some fat has found a secret to running without shattering his kneecaps, but this sounds hammy.