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Samuel Kiplimo Kosgei
Personal information
Born	January 20, 1986
Died	May 26, 2023 (aged 37)
Sport
Sport	Athletics
Event	10 km – marathon
Achievements and titles
Personal best(s)	10,000 m – 28:44.13 (2006); HM – 59:36 (2009); Mar – 2:06:53 (2016)

Samuel Kiplimo Kosgei (January 20, 1986 – May 26, 2023)^[2] was a Kenyan long-distance runner who specializes in road running competitions.

One of his first international competitions was the Outer Banks Half Marathon in 2007, where he finished first in 1:02:34.^[3] The following year he ran at the 2008 World's Best 10K in Puerto Rico where he recorded a time of 28:13 for sixth place.^[4] He finished second at the Reims Marathon later that year. He returned to Puerto Rico in 2009 and improved upon his past performance, running a personal best of 27:49 for fourth place behind Wilson Kipsang.^[5]

Kosgei greatly improved his half marathon best at the Berlin Half Marathon, running 59:36 and finished just two seconds behind the winner Bernard Kipyego.^[6] Shortly after, he took part in the London 10,000 and took second place behind Mo Farah.^[7] He was given the task of pacemaker at the 2009 Berlin Marathon later that year and he led Haile Gebrselassie up to the 32 km mark.^[8] He started 2010 at the Lisbon Half Marathon but his time of 1:01:57 was only enough for ninth and some distance off the winner Zersenay Tadese, who set a world record.^[9] At the BIG 25 Berlin race in May, he established himself in elite road running by winning in a world record time for the 25K – his mark of 1:11:50 knocked almost a full minute off Paul Malakwen Kosgei's former world best. Mary Keitany also set a world record in the women's section, making it the first time that two 25K world records had been set at the same race.^[10] He won the Košice Peace Marathon in 2015.