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Chicago Tribune
Chicago Tribune
Sport
Paul Sullivan

What led to MLB’s decision to play Tuesday’s Cubs game at Wrigley Field in ‘very unhealthy’ air quality conditions?

MLB Cubs Ian Happ Wrigley Liam Hendriks Baseball Chicago Phillies

CHICAGO — Baseball fans have been inundated by new stats over the years, from WAR to wRC+ and exit velocity to barrels.

Welcome to the club, AQI.

Air Quality Index, the latest addition to the baseball glossary, has been picking up speed since early June, when the New York Yankees, Philadelphia Phillies and Washington Nationals had games postponed due to poor air quality from the wildfires in Canada.

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