All posts byJeff Sackmann
Jeff Sackmann runs the tennis stats website tennisabstract.com and co-founded the amateur baseball data service College Splits. His work has appeared in The Economist, The Wall Street Journal and Tennis magazine.
Jeff Sackmann runs the tennis stats website tennisabstract.com and co-founded the amateur baseball data service College Splits. His work has appeared in The Economist, The Wall Street Journal and Tennis magazine.