Yankee Stadium to add more protective netting
Baseball Rule - Wikipedia
Foul balls hurt hundreds of fans at MLB ballparks. See where your team stands on netting.
Dodgers plan to extend protective netting in wake of fan injuries - Los Angeles Times
White Sox debut new extended safety nets
White Sox extend netting at Guaranteed Rate Field
Blue Jays to announce expansion of protective netting at Rogers Centre
Chicago White Sox plan to extend netting at Guaranteed Rate Field
Braves will extend protective netting to foul poles at SunTrust Park