All this week, Marketplace Tech has been talking about sports and technology for our “Gaming the System” series. Today, we take you to a hockey rink right about the spot that A-Rod usually stands — that’s right, Yankee Stadium. On the eve of a big outdoor hockey game at New York’s Yankee Stadium, Marketplace Tech host Ben Johnson finds out how the NHL is converting a baseball field to a hockey arena. Click the audio player above to hear his interview with Kris King, senior vice president of hockey operations for the NHL.