Play a 1 minute quarter exhibition game with the browns on rookie difficulty.
Go to share and manage files on the main menu and download the roster titled 00VERALL which is a roster that has the browns with terrible ratings. The roster is by gamertag kpjets and that is a zero followed by a capital letter O.
Load the roster from Share & Manage files > Load files
Go back to exhibition mode.
Start from the top of the list with the bears and the opponent the browns.
No settings have to be changed.
Do kickoff then after the kick off super sim to the end.
Change the sim speed too fast.
After the match click finish game and it will go back to the main menu.
Make sure you see it says it saved your profile. IF NOT go and save it manually under the gear logo, share & manage files, and then save files.
Repeat for the 31 other teams.
After the last match which should be the vikings you will need to a 1 minute quarter match legitly against the terrible browns team and the achievement will pop at the end of the match.
Took me roughly a little over an hour to do this maybe closer to 90 minutes.