Strangely it doesn't seem impossible... and when you break it down it seems even more possible (this coming from a glass half empty type)...
By the looks of things now it's going to be either NY or BAL and OAK or TEX getting the WC spots, respectively... probably TEX wins the division... so OAK gets one WC spot.... and I can easily see NY falling off the map... so the 2nd WC spot could go to almost anyone, but most likely it goes to BAL... unfortunately what was a lucky season last year has turned into a crazy good offense this year. With an outside shot going to TOR, TB, NY, or KC.
And call me a conspiracy theorist but I think MLB wants NY to go to the play-offs and they may just tweak things to make sure they do because: 1) It's NY 2) It's Rivera's last season