Tirunesh Dibaba of Ehtiopia was the women's victor, finishing in 2:18:30. Only Deena Kastor's 2:19:36 at the 2006 London Marathon is the fastest marathon by an American woman. The last American to win the Chicago Marathon was Khalid Khannouchi in 2002.
Dibaba, 32, is a two-time 5,000m world champion and three-time 10,000m world champion who settled for second at this year's worlds in London, trailing only compatriot Almaz Ayana. Her sub-2:21 clocking is a course record for Americans. The men's pack at that pace was as large as 26 people.
He was the first runner from New Jersey to cross the finish line. The slow pace was not that unusual as in 2016 the winning time (2:11:23) was the slowest since 1993.
The men split 1:05:49 through the halfway point while the women were not far back in 1:08:48. Rupp's time beat out last year's champion, Kenyan Abel Kirui, by 28 seconds, the Chicago Tribune reports. Rupp, 31, of Portland, Oregon, was also second in the Boston Marathon last spring.
Rupp, competing in just his fourth marathon, surged clear of the rest of field in a tactical race with a 24th mile recorded in just 4min 30sec. Stanley Biwott, a 2:03:51 marathoner and victor of New York City in 2015, dropped out shortly after.
Dibaba in her debut in Chicago clocked 2:18:30 while Kenyan Birid Kosgei who braved the high tempo throughout sticking to the Ethiopian came in second, one minute 53 seconds later.
As Dibaba had more than a minute lead at the 40K mark, she was never in danger of finishing outside of the winner's circle. She stayed with the lead pack throughout and finished in third place with a time of 2:20:57.
Stay tuned for top Canadian results from the 2017 Chicago Marathon.