Feyisa Lilesa is an Oromo long-distance runner from Ethiopia. He became the youngest man to run under 2:06 when he ran 2:05:23 in the men's marathon at the 2010 Rotterdam Marathon. He set his personal best of 2:04:52 in the marathon when he came in second place at the 2012 Chicago Marathon.

The 2012 Chicago Marathon was the 35th edition of the annual marathon race in Chicago, Illinois and was held on Sunday, October 7. An IAAF Gold Label Road Race, it was the fourth and final World Marathon Majors event to be held that year. Tsegaye Kebede won the men's race in a course record of 2:04:38 hours and Atsede Baysa was the women's winner in a personal best of 2:22:03. A total of 37455 runners finished the race.