Импортируйте SBJSON/JSON.h
файл заголовка и сделайте что-то вроде этого ...
NSString *jsonResponseString = ...your JSON response...;
NSDictionary *jsonDictionary = [jsonResponseString JSONValue];
NSDictionary *players = [jsonDictionary objectForKey:@"players"];
NSDictionary *player = [players objectForKey:@"key_0"];
NSLog( @"%@ %@ %@ %@ %@ %@ %@", [player objectForKey:@"is_out"],
[player objectForKey:@"runs"], [player objectForKey:@"balls"],
[player objectForKey:@"four"], [player objectForKey:@"six"],
[player objectForKey:@"batsman_name"], [player objectForKey:@"wicket_info"] );
... и т. Д.