Career
His time of 2:06:47 hours at the 2003 Paris Marathon made his the fastest ever debut run at the time, but he never bettered the mark. His best time for the half marathon was 1:00:52 hours, and he had victories over that distance at the Paris Half Marathon, America"s Finest City Half Marathon, and Reims Half Marathon. Wilson began his major race career in 2000 with a series of half marathons in France.
He was third at Le Lion Half Marathon, improved to second place at the Auray-Vannes Half Marathon, then claimed his first victories over the distance at the Reims Half Marathon and Saint PolMorlaix Half Marathon.
He was based in the United States for 2001 and took wins at the Charleston Distance Run 15-miler and America"s Finest City Half Marathon. He had three consecutive runner-up finishes that year, being the second-best runner at the Nice Half Marathon, BIG 25 Berlin and Lille Half Marathon.
He set two career bests that year – a 10K best of 27:55 minutes at a race in Louisiana Courneuve and a 25K best of 1:14:51 hours in Berlin. He stepped up to the full marathon distance in 2003 at the Paris Marathon and recorded the fastest ever time for a débutante -- coming in third with a time of 2:06:47 hours.
He also set his half marathon best that year, claiming the Lille Half Marathon title in a time of 1:00:52 hours.
He ran two sub-2:10-hour marathons in 2004, coming third at the Lake Biwa Marathon and fourth at the Berlin Marathon, and also came fourth at that year"s Bogotá Half Marathon. He was selected to represent Kenya in the marathon at the 2005 World Championships in Athletics, but he did not manage to finish the race as he dropped out after 30 km. He was some way off his best times in the 2006 season as he was ninth in Boston (2:13:47) and 21st at the Chicago Marathon, where he slowed in the second half of the race and crossed the line after 2:16:12 hours.
He returned to the marathon distance in 2009 at the Tiberias Marathon and he was seventh with a time of 2:13:43 hours.
An appearance at the 2010 Annecy Marathon—one of the lesser European marathons—showed Onsare far outside of his previous elite standard, as he came seventh with a time of 2:29:51 hours.
