Rhonex Kipruto's parents are farmers. He grew up in Kombatich and his coach is Colm O'Connell. 2017 In 2017 Kipruto came in third at the 10k in Prague in a time of 27:13. 2018 On 10 February 2018 he placed second in the Kenyan National Cross Country Championships. The 8 km Junior Men run was won by Stanley Waithaka in 22:09.2 and Kipruto came in in 22:30.3. The following month on 17 March, he participated in the African Cross Country Championships U20 race in Algeria. He won the 8 km run in 25:01, 5 seconds ahead of Stanley Waithaka. Kipruto won the UAE Healthy Kidney 10k in Central Park, New York City, U.S. on 29 April 2018. Leonard Komon set the then course record with 27:35 in 2011. Kipruto finished in 27:08, the fastest 10k on a record eligible course on US soil. He went to the IAAF World U20 World Championships that took place from in Tampere, Finland from 10–15 July 2018. On 10 July 2018, he won the World U20 Championship title in the 10,000 m with a time of 27:21.08, a new championship record. Jacob Kiplimo of Uganda placed second 22 seconds behind, with a time of 27:40.36 and Berihu Aregawi of Ethiopia came in third with 27:48.41. On 8 September 2018, he ran in his third 10k race the second-fastest time for a 10 km road race with his winning time of 26:46 in Prague. Geoffrey Koech came in second in 27:18 and Mathew Kimeli finished ranked third in 27:26. 2019 Kipruto on the IAAF Cross Country Permit in Elgoibar on 13. January in a time of 32:05 and Selemon Barega placed second in 32:27. Stanley Waithaka 32:54 finished third placed. Kipruto placed 6th in the men's senior race at the Kenyan Cross Country Championships on 23 February 2019 in Eldoret. He finished 18 seconds behind Amos Kirui's winning time of 29:51 in the 10 km race. He ran in the men's senior race at the 2019 IAAF World Cross Country Championship in Aarhus, Denmark. Kipruto finished 6th in a time of 32:17 out of 144 starters. The run was won by Joshua Cheptegei in 31:40 and Jacob Kiplimo placed second in 31:44. However, Kipruto won the silver medal in the team ranking with Kenya behind Uganda and ahead of Ethiopia. On 4 July 2019, Kipruto won the Peachtree Road Race, in Atlanta, Georgia, with a time of 27:01, breaking the previous course record and setting the record for the fastest 10k time ever on American soil. The Association of Road Racing Statisticians describes this race as "Acceptable for ranking, no record quality...". The former course record was set in 1996 with a time of 27:04 by Joseph Kimani. Kipruto's brother Bravin Kiptoo placed second with a time of 27:29 and Kennedy Kimutai finished third place with 27:54. At the Kenyan National Championships on 21 August, Kipruto placed second in the 10,000 m in a time of 27:26.34. The race was won by Geoffrey Kamworor in a time of 27:24.76. 2019 IAAF World Championhips in Doha, Qatar On 6th Oct 2019 Kipruto raced the 10,000 m. The winner was Joshua Cheptegei in 26:48.36, the runner up was Yomif Kejelcha in 26:49.34. Kipruto took the bronze medal in 26:50.32. 2020 On 12 January 2020 Kipruto set a 10 k road race world record in Valencia. He won in 26:24. The former world record was set by Joshua Cheptegei in Valencia on 1 December 2019 with 26:38. Benard Kimeli came in second after Kipruto with 27:12 and Julien Wanders of Switzerland finished third place in 27:13, a new European record. Kipruto covered the first half in 13:18 and the second one in 13:06. Wanders improved on his own European record by 12 seconds.
