At the 2002 Lisbon Half Marathon, Kipsang Korir was better, while Cheruiyot Korir beat his namesake at a cross country event in Kenya in 2003. At the 2005 Cherry Blossom 10-Mile Run, John Cheruiyot Korir was fifth in an event won by John Kipsang Korir.
At the 2002 Lisbon Half Marathon, Kipsang Korir outperformed his cousin, while Cheruiyot Korir triumphed over him in a cross country competition in Kenya in 2003. At the 2005 Cherry Blossom 10-Mile Run, John Cheruiyot Korir placed fifth in an event won by John Kipsang Korir.