William Cheruiyot Sigei (born October 11, 1969 in Cheboi'ngong' village, just outside of Kapsimotwo village, Bomet, Kenya) is a former Kenyan long-distance runner who won the IAAF World Cross Country Championships in 1993 and 1994. In 1994 he a set a new world record over 10,000 metres in Oslo with 26:52.23 minutes.
- William Sigei profile at IAAF
- Okoth, Omulo (17 March 2007). "A Kenyan XC legend - William Sigei". IAAF. Retrieved 2007-03-19.
|Men's 10,000 m World Record Holder
July 22, 1994 – June 5, 1995
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