Scenarios abound in the determination of the men's winner.
The London Marathon champ has a penchant for mobile phones.
More big names join an already-stacked field.
WMM contenders Gebremariam, Kiplagat lead respective fields in Daegu, Korea.
He is looking for his third victory.
Reigning Boston Marathon champ dominates star-studded field.
The runners will be competing on a 1130-meter circuit
The Boston, New York, and London champions will face each other in Sicily.
He does not like running in Daegu.
Check out these great photo of two of the fastest marathoners in history: Emmanuel Mutai and Geoffrey Mutai of Kenya.