Wrong Ball in Golf: Penalty and How to Correct the Mistake
What is a wrong ball?
You play a wrong ball when you strike any ball that is not your ball in play. This includes:
- Another player's ball
- An abandoned ball you found in the rough
- A provisional ball you shouldn't have played at that point
It is not a wrong ball if you play your own provisional ball, a second ball under Rule 20.1c, or a legitimately substituted ball.
Penalty
Stroke play (Medal, Stableford)
- 2-stroke penalty
- You must correct the mistake: go back and play from where your original ball lies (or a substituted ball)
- If you don't correct the mistake before leaving the hole area (before making a stroke from the next teeing area), you are disqualified
Match play
- Loss of hole automatically, with no opportunity for correction
How to correct the mistake in stroke play
- As soon as you realise the error, stop playing the wrong ball
- Return to where your original ball was and play it from there
- All strokes made with the wrong ball don't count on the scorecard — only your original ball's strokes count, plus the 2-stroke penalty
Example: you're on the 7th hole in 3 strokes. You accidentally play another player's ball. You realise before the 8th tee. You return to where your ball was, play it from there = 3 + 2 penalty strokes + next stroke. If you hole out in one more, you finish the hole in 6.
Exceptions
Penalty area
If you play a wrong ball inside a penalty area, there is no wrong ball penalty (Rule 6.3c exception). Simply identify your ball and continue.
In a bunker
If you play a wrong ball in a bunker, the standard 2-stroke penalty applies.
How to avoid playing the wrong ball
- Always identify your ball before hitting: check the brand and number
- Mark it with a pen: one or two distinctive marks (dot, line, initials)
- Announce your ball when putting it in play at the start of each hole: "playing a Titleist Pro V1 number 3"
- If in doubt, don't hit until you can confirm it's your ball
Common situation: identical balls in the rough
It's common for two players to play the same brand and number. If there's doubt in the rough, neither player should hit until each identifies their own ball. If both balls are identical with no distinguishing marks, both are treated as lost — which is entirely avoidable with a permanent marker.