The 17-year-old Cain took nearly a second off the previous mark.
The high school senior finishes on the podium at the NYC Gotham Cup
The 17-year-old high school senior turned professional last year and is now coached by Alberto Salazar.
Take a look back at the exciting 2013 season and see who we named the top runners of the year.
The American silver at the World XC Champs is a the top of the list.
The teenage sensations will square off in February.
Mary Cain announced last week that she was turning professional.
The American standout will continue to be coached by Alberto Salazar.
The American middle-distance ace wants to have fun.
Five meet records and 11 world-leading performances were the reason.