In order to ensure that this series at least comes back to Milwaukee, the Brewers need to win one game in Los Angeles out of the three. If they can win two of the three, they will come home to Miller Park with a chance to advance to the World Series in Game 6. If, on the off chance they win all three games in L.A., they would clinch out there in Game 5.
I think the Brewers can win at least one out west while winning two would be preferable. I don’t see a three game sweep in Los Angeles happening at all.