That's because Norman, Sorenstam, and multiple other golfers have their own wine labels. In some cases, the labels are produced in partnership with outside vineyards; in other cases, the pro golfer is much more deeply involved in the business, down to owning the winery and vineyards himself (or herself).
Other golfers with their own wine labels include Arnold Palmer and John Daly, Nick Faldo and Ernie Els. To read more about the wine labels of pro golfers, see our list of golfers wines.
If you know know someone who loves both golf and wine, a bottle of wine from a professional golfer's label could be an interesting gift.