The easiest way to do this is to choose a five star team, set the difficulty to Semi-Pro, and start a World Cup tournament.
Win the first two group games, whatever scores you want.
In the third and final group game, score 14 (15 if you want to make sure) own goals. Keep passing back from your kick-off's and tap it in with your own goalkeeper. You'll lose the game of course, but it doesn't matter, you're through. (As noted in the comments, it is possible to still go out, but this is an incredibly rare occurrance and in all likelihood won't affect you)
Do the rest of the tournament normally. This method saves you keeping track of the goals against you, as you only need to concede the fifteen goals in a single game.