Quote Originally Posted by 401don View Post
Those are outdoor stadiums that only close their roofs in inclement or hot weather. Ford Field, like Toronto, cannot grow grass.
From what I have read about the situation in Toronto, the main issues with installing natural grass are due to the limitations in the design and age of the retractable roof, which they only open when temperatures above 15 Celsius [[59 Fahrenheit), and the lack of the needed drainage system in the concrete floor surface.

If Ford Field was renovated with a retractable roof for the explicit purpose of making it more conducive to playing soccer, would they not install a roof designed to be opened in temperatures below 59 degrees, like all the other modern retractable roof stadiums, and also install the needed drainage on the field?