Wiktionary
n. (context cricket English) a cricket ball that has been used in a previous match; one that has been used in the current match for over 30 overs
Usage examples of "old ball".
Westaway was the sort of man who keeps old ball-programmes and bundles of letters tied round with lilac ribbon.
If this blue and white ball came through the mirror and I can't get my old ball back, do you have any reason to suppose that when that boy comes through the mirror, I'm going to be able to get you back?
The ball would rise from the bat and then I would hear the light crack of contact and it would go up into the cloudless sky, almost vanishing, black at its apogee, coming down white and bruised, an old ball bruised green from the grass.
He asked Bella to bring him a new ball, and he complained that they had to keep pumping his old ball.