|World Indoor Championships|
|Bronze||2003 Birmingham||3000 m|
|World Cross Country Championships|
|Silver||2002 Dublin||Short race|
His first major medals came in 1998: he took the 5000 metres gold medal at the 1998 Goodwill Games and then a silver medal behind Haile Gebrselassie over 3000 m at the 1998 IAAF Grand Prix Final. Two years later at the 2000 IAAF Grand Prix Final, he won the gold in the event. A silver medal over 5000 m at the 2001 Goodwill Games was followed by a bronze at the 2001 IAAF Grand Prix Final. He is a four-time winner of the Zatopek 10,000 metres race in Australia and holds the current race record of 27:22.54, set in 1998.
He has also competed in cross country running and won the Cross Internacional Valle de Llodio in 1998 and the Cross de l'Acier in 2000. He was the silver medallist in the short race at the 2002 IAAF World Cross Country Championships, finishing behind Kenenisa Bekele but helping Kenya to the team gold. He won his first global track medal at the 2003 IAAF World Indoor Championships, taking the bronze medal over 3000 m.
He later switched to road running and took 10K wins at the Cooper River Bridge Run in 2004 and the Azalea Trail Run in 2005. He made his debut over the marathon distance at the 2010 Antwerp Marathon and recorded a time of 2:14:37 for second place.
In December 2010 Luke was invited back to Melbourne as part of the 50th Anniversary celebrations of the Zatopek:10. Luke decided to also race the 10000m track event, placing 5th behind Josphat Menjo in 28:47. Despite being the fastest 10000m runner of 2010, Menjo was unable to break Luke's race record, winning in a time of 27:39.80.
|1998||Goodwill Games||Uniondale, United States||1st||5000 m|
|2001||Goodwill Games||Brisbane, Australia||2nd||5000 m|
|2002||World Cross Country Championships||Dublin, Ireland||2nd||Short race||Individual|
|2003||World Indoor Championships||Birmingham, England||3rd||3000 m|
|World Athletics Final||Monte Carlo, Monaco||7th||3000 m|
|2004||World Athletics Final||Monte Carlo, Monaco||10th||3000 m|
- 1500 metres - 3:35.48 min (1998)
- 3000 metres - 7:27.59 min (1998)
- 5000 metres - 12:56.50 min (2000)
- 10,000 metres - 27:12.37 min (2001)
- Half marathon - 1:01:18 (2007)
- Marathon - 2:14:37 (2010)
- Kipkosgei, Luke. IAAF. Retrieved on 2010-12-09.
- Emil Zatopek Memorial 10,000m. Association of Road Racing Statisticians (2010-08-27). Retrieved on 2010-12-09.
- Downes, Steven (2003-03-23). Victory sees Bekele ready to take Dublin at the double. IAAF. Retrieved on 2010-12-09.
- Men 3000 Metres Final. IAAF (2003-03-16). Retrieved on 2010-12-09.
- Jaggers, Cedric (2010-04-07). Cooper River Bridge Run 10 km. Association of Road Racing Statisticians. Retrieved on 2010-12-09.
- Post, Marty (2010-03-30). Azalea Trail 10 km. Association of Road Racing Statisticians. Retrieved on 2010-12-09.
- Antwerp, 25/04/2010, BEL - DVV Antwerp Marathon & 10 Miles. Sport.be. Retrieved on 2010-12-09.