Blitz The League

I found out this way on my own. This is by far the easiest to get this achievement because it's fool proof. I've tested it many times and it works everytime. There is a play under the trick category called WRTossNPass. If you do not have this play in your play book, use a different team, but usually you will have it (Orlando & Nightmare have this play I believe). To fumble all you have to do is select WRTOSSNPASS. Before you hike the ball go to audibles and select flip play (rb). Immediately after selecting flip, mash the A button to hut. Because your player is not set up, you will automatically fumble the ball. That's IT! The hardest part is not picking the ball up after, but that shouldn't be too hard. Good luck

The best way to get this one is in quickplay using a Div 3 team vs the NY Nightmare. Set the quarter length to 5 min each and play to lose.

You will have to be careful because most of the time you fumble your linemen will go to pick it up.

When they are on Offense just let them score, you want their Def/ST on the field most of the time to insure they get 5 Fumble Recoveries.

I just used my QB to drop back on speed plays and let them have at him. The CPU usually forces a fumble on an unleashed move so let them build theirs up.

Losing Brawls is the best way to get thier Unleashed meter up.

This achievement only counts for the opponents Fumble Recoveries not Forced Fumbles so be sure to check your stats often to make sure they have 5 recoveries in the end.

I would follow the above guide, but with the inclusion of some cheats.

You can implement the cheats CLASHY and BIGDOGS

Go to the extras click on codes
type the cheat BIGDOGS for unlimited unleash energy
type the cheat CLASHY for unlimited clash energy

Now chose quickplay using the nightmare vs arizona, with your team being Arizona.

Set the quarter length to 3 minutes or higher if you wish. set the AI to easy and activate the cheats.

Now just follow Titanus's above method, and the achievement shall be yours

Credit goes to NIREXINE

If you are having trouble getting the fumble achievement try this: When you get the ball try for a long field goal, (doesn't really matter where you are on the field) and then miss every button sequence. The holder should fumble the snap and then you just have to keep your team away from it. I did it agianst New York Nightmare on hard and it worked like a charm.