New Delhi: Umpires are a crucial part of cricket. No cricket match can be played without an umpire. Umpiring is a difficult task which involves tough decisions, criticism by players and fans on wrong decisions whereas applause by all on correct ones.There are many famous and honest umpires in the international cricket who stand in matches of all formats of cricket to look after the important decisions during the game.Some umpires stood in matches for a short period but some became regular and known faces in the gentleman game.Let's look at a list of umpires who stood in most ODI matches in the history of international cricket. 1. Rudi Koertzen: South African umpire Rudi is 1st on our list who stood in 209 ODI matches. He started his career as umpire in 1992 and retired on 2010. 2. Steve Bucknor: A very familiar face in international ODI matches, Bucknor was a West Indian umpire who umpired in 181 matches starting his career from 1989 to 2009. 3. Billy Bowden: Known for his unique style of signaling, Billy is an umpire from New Zealand who is standing as an umpire from 1995 till present. Since his debut he umpired in 180 ODI matches. 4. Daryl Harper: Daryl was an Australian umpire who stood in 174 ODIs from 1994 to 2011. 5. Simon Taufel: Now retired, Simon was an Australian umpire who umpired in 174 ODI matches equaling the number with his Australian counterpart Daryl Harper. Simon started his umpiring career in 1999 and bid adieu on 2012.