Kenyan Moses Mosop, second at Boston in 2011, also announces withdrawal from race.
A strong international field will line up in The Windy City on October 13.
The fastest American marathoner of all time has a quad injury.
Yemane Tsegay is expected to do great things there.
Forty eight athletes from 14 countries will take part.
He DNF'd there in 2012.
The world's second-fastest marathoner heads to Dubai next month.
He wants to continue the Kenyan dominance in New York.
Past champions and multiple Olympic medalists are listed amongst the top entrants.