When then Bank One Ballpark was being designed and built one of the features that was most intriguing was the retractable roof. Having a roof that could open and close in just under five minutes has a lot of advantages.

With summer temperatures reaching and sometimes exceeding 118 degrees during the summer, baseball would be unbearable in Arizona for much of the baseball season. At these times the roof is closed and the stadium is air conditioned to ensure fans’ comfort.

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