Chebet picked up his first major victory in two hours six minutes and 51 seconds, with compatriots Lawrence Cherono and Benson Kipruto second and third.
Kenyan Brigid Kosgei broke Paula Radcliffe's 16-year-old women's marathon world record but former Alberto Salazar coached athletes, including Mo Farah, were never a factor in the Chicago Marathon.
Olympic champion Eliud Kipchoge staved off a surprise challenge from Ethiopian debutant Guye Adola to win an enthralling Berlin marathon on Sunday, but missed out on his bid to set a new world record.
Britain's multiple world and Olympic champion Mo Farah ended a three-year absence from the track in style on Friday when he broke the world record for the one hour run at the Brussels Diamond League athletics meeting.
The Tanzanian held off a challenge from Kenyan Fred Mogaka before kicking clear to win the Commonwealth Games men's marathon, his first major title.
Ethiopia's Tirunesh Dibaba bided her time before letting loose on the final lap with an awesome display of speed to complete a hat-trick of world championship 10,000 meters titles in Moscow.
Ethiopia's Genzebe Dibaba eased through to the finals of the women's 5,000 metres on Thursday to stay on course for a world athletics championships double, while American Brittney Reese saw her six-year long jump reign end.
Ethiopia's Almaz Ayana ran the second fastest women's 5,000 metres in history as she missed out on the world record by just over a second at the Rome Diamond League in Rome, on Thursday.
Ethiopian Atsedu Tsegay demolished the course record to emerge triumphant in the elite men's category, while Florence Kiplagat led a Kenyan clean sweep in the women's event of the Airtel Delhi Half Marathon in New Delhi.
A summary of sports events and persons who made news on Sunday
A summary of sports events and persons who made news on Monday