AFAICT nobody really knows. John might be nicknamed Richard, and run under that name, with his own bib (and number). So while appearing that Richard ran faster than he did, maybe in fact he ran as fast as did under his nickname of John. The OP didn't cover this, as she was too busy talking about the virality of Facebook (which later came to the rescue), giving her readers tips on pacing ("a delicate art"), talking about Rossi, then BQ ladies (who are more admirable than some chick known as "Marathon Barbie" it seems---and one of whom has written a book), how some 30-ish guy named Judy Bell won the Female 55-59 division (before "understandably" being DQd), what the possible John/Rich motives were (at least in her mind), how "bib mules" work, ... before we get to the big punchline...
But in fact, they did (it seems). Similarly, maybe it will turn out that the OP "did not intend" to write a novella blogpost with Seinfeld-level nothingness at the end of the day, but in fact, she did.
There's also an entitlement of hers that "getting yourself disqualified" is an "art" (which doesn't quite make it "actually interesting" to me), and perhaps that Facebook is initially involved in this. The incident is also referred to as "funny" (OP blogpost, first sentence, second word). It's hard to know how impartial she really is. OK, maybe this synopsis is running a bit long and incoherent, but (trust me) it's much superior than the original.