In 2013, 1,100 U.S. marathons generated a record 541,000 finishers.
More than 77,000 marathon hopefuls applied for spots in the 2014 race.
He paced a friend for 18 miles in New York a day after winning the Dash to the Finish Line 5K.
The Dutch company no longer backs Miami, New York, and Hartford.
Both runners struggled in the race but met up with three miles left and finished together.
When 50,000 runners finish a race, there are a lot of numbers you can crunch.
The leading American last weekend believes his race helped build character and mental toughness.
Viewership was up 66 percent compared to the 2011 edition of the race.
86-year-old Joy Johnson finished Sunday's New York City Marathon in 7:57:41. She passed away the next day.
The Kenyan tandem has been making many public appearances in the wake of their victory on Sunday.