Umpire is a term referred to the person who adjudicates decisions on the field and also overlooks the management of the game on the field. The game of cricket has two umpires adjudicating in the middle. One stands at the bowler"s end (main umpire) and one stands at a square position on the leg side (leg umpire). At the change of the over the umpire at the square-leg will stand at the bowler"s end, while the main umpire of the previous over will stand at the square-leg.
The main umpire will adjudge decisions regarding catches (in front orbehind the stumps), leg before the wicket, run out at his end, bowled,hit wicket, handling the ball, while the umpire at the square-leg willadjudge stumpings and run outs at his end. The main umpire, however, can consult the square-leg umpire on decisions, which his eye was not in a position to catch.
With the modern day inventions and the added pressure on the umpires,the game of cricket has seen the introduction of the third umpire to aid proceedings in the middle. The third umpire stays off the field and is equipped with the television replays. Close stumping, run outs andboundary line calls are often referred to the third umpire who with thehelp of TV replay is then able to give a accurate decision, which isthen conveyed to the on field officials. Decisions from the third umpire regarding run outs and stumpings are normally in the form of red and green lights.
Sometimes close catches are also referred to the third umpire.