Keith Andrew Senior is an English former professional rugby league footballer who played for the Sheffield Eagles and the Leeds Rhinos in the Super League. A Great Britain and England international representative centre, he is considered one of the greatest players of the Super League era.

The Super League is the top-level of the British rugby league system. At present the league consists of twelve teams, of which ten are from Northern England, reflecting the sport's geographic heartland within the UK, one from London and one from southern France.