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.
American runners had a good showing last week in Moscow!
The American captured her second career world championship medal on Thursday night.
The American was passed by Ethiopian Mohammed Aman with 20 meters to go.
Galen Rupp and Mary Cain are two distance stars to check out.
Star miler Mary Cain flashed a smile on the Mondo track.