It doesn’t matter which sport you pick, but pick one and use it to help secure numeracy with your child.
Baseball and cricket are both excellent sports to help teach a whole range of baths including pitches, runs, hits, errors, overs, run-rate, probability etc.
Golf is great because the winner is the person with the lowest score which is usually a negative number.
Although football scores are low, there are huge amounts of stats online which are great to share with your child to understand which team is likely to win the next match and what it means to their position in the table if they win, draw or lose.
Athletics is mostly about time which is also a really great way to help a child understand times, decimal places, averages and personal bests.