Cosmas Muteti began his marathon career around 2017. His personal best in the half marathon is 1:08:19, set in December 2016. In 2017, Muteti won the
Kuala Lumpur Marathon (2:18:42) and the Perlis International Marathon (2:24:19). The following year, he won the
Bali Marathon with a time of 2:15:25. He won the
Kilimanjaro Marathon twice, in 2018 (2:17:00) and 2019 (2:18:16). Muteti recorded a 5th-place finish at the
2021 Berlin Marathon with a time of 2:08:45, a personal best at the time. He finished 2nd at the 2022
Sydney Marathon, clocking 2:07:05. Muteti was 5th at the
Marathon de Paris in 2024 with 2:07:37. Muteti is coached by former marathon world record holder
Patrick Makau. == Achievements ==