This app was mentioned in 7 comments, with an average of 5.14 upvotes
https://play.google.com/store/apps/details?id=com.ncaa.mmlive.app&hl=en
Download the android app to you're phone use the Xfinity password and then cast whatever game you want to the Shield
thanks for this :)
heres the link.. https://play.google.com/store/apps/details?id=com.ncaa.mmlive.app
also @ u/markjohn8102