What's a non-runner? A non-runner is a term commonly used in horse racing to identify when a selection that was due to run in a race has subsequently withdrawn. It can also be used across other sports to identify a selection that was due to compete in an event but subsequently did not take part. If you need any further assistance, please see our contact details here. Related articles What's a puck line bet? Contact us Subject access request What's an Asian handicap bet? What happens to my bet if my horse is disqualified?