Just to let you know I am having the same problem that you are and when I say the same I mean the exact same. Madden 15 used to work local and then all of a sudden it would not so i just bought madden 16 because i thought it was just 15 but no it is 16 too. we called x box and they did not help and I have no idea what to do
I am having the same issue with Madden 20. I don’t have anything else plugged in and other games recognize both controllers
you have to sign in with the controller. Turn the game on with one controller then while in the play now screen turn the other on and it should see the controller but will ask you to sign into the xbox. Sign in as "guest" and it should work.