Toronto provides MLB with access to its on-field operations department, and the decision is based on the same criteria the Blue Jays use during the regular season. Friday's forecast for Game 2 didn't appear to include any rain but the temperatures were expected to be around 15 degrees Celsius (57 Fahrenheit).
According to Blue Jays vice president of business operations Stephen Brooks, 15 degrees Celsius is "starting to push the roof's temperature limit. It could be the sunniest of days but that is just the facts." Toronto has been looking to upgrade the retractable roof's mechanisms to withstand colder temperatures.
Toronto, which lost Game 1, 5-3, with the roof closed, went 38-14 with the roof open at home this season and 11-14 when it was closed. The Blue Jays also went 4-0 in "other" situations, which includes either the roof being open and then closed midway through the game or vice versa.
Gregor Chisholm is a reporter for MLB.com. Read his blog, North of the Border, follow him on Twitter @gregorMLB and Facebook, and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.