He is not the overall project manager, he is a lower level project manager on a small portion of the project. The only thing that he even said regarding the grass is that it spends very little time inside of the building and just a couple of days before the game it goes in and then they take it back out. That comment was just a general comment without any consideration to how long the field takes to move, how long before the game the field needs to be moved, etc.
As for moving the field into the stadium, it takes about 90 minutes
Rolling on 13 rails through a 14-by-240 foot opening on the south end of the stadium, the process for bringing the turf in or out is an intricate one. The field tray will take about 90 minutes to fully move in or out of the stadium via 76 electric motors moving the tray along a rail line.