For 3 people on the same team:
(All three controllers must be on and 2 and 3 must be wireless)
1 - Press start on controller 1 and turn off controller 2
2 - On controller 1 go to the controller select screen, and move over controller 3
3 - Go back to the first menu (original start screen) and turn on controller 2 and that's it
If you do it at the kickoff, all three players will be in after the kick off..
For 4 people on the same team:
(Controllers 2 and 3 wireless)
All the same steps as above then...
1 - After moving over the third controller with the second controller off, go back to the first menu (original start screen) and turn off controller 3 now (Controller 2 is still off)
2 - On first controller go back to the controller select screen, and move controller 4 over now
3 - Go back to the first menu (original start screen) and turn on controllers 2 and 3 and that's it
After the next play you'll all be in