Getting back to magic number talk, let's discuss clinching a playoff spot....
There are 3 teams currently on the outside of the WC race that the Brewers have not yet closed out - Miami, Cincy, and SF.
The magic number for Miami is 5 - sort of. If Milw wins just one of its remaining 3 games with the Marlins, the Brewers would win the season series and thus own the tiebreaker. So, if the Brewers entered that series still at magic number 5 (perish the thought), winning that one game would bring it down to 2.
For Cincy, it is now 3, and for SF it's 4 by virtue of SF having the tiebreaker.
If you're wondering about the #1 WC spot (because they get to host, too), we are concerned with Philly and Az - we know our magic number is 6 with Chicago. We have a magic number of 8 with Philly and 7 with SF.
So, to summarize the magic numbers: Division: 6, any WC: 5, #1 WC: 8.