Some scientists don't think so.
He has won the race on four occasions has and set the world record twice there.
He says don't expect to see a world record there.
Geoffrey Mutai is also not competing there.
John Hancock will continue awarding $50K bonuses for world-best times, however.
He rabbited two world-record marathon performances.
The final figures are well within the 5 seconds per kilometer value the ARRS uses to disqualify performances as excessively aided.
The great Ethiopian marathoner admits Boston is no cakewalk.
He also credits God for his victory.
"Why not?" asks the race's head official.