As of this morning, Baseball Prospectus has the A's at a 50.3% chance of making the postseason in the Playoff Odds. That's down about 6% in the last week while the Angels are down about 2%. How can the top two teams in the division both be down? Either someone else in the division had a good week or it became increasingly unlikely that the AL Wildcard will come from the West. Glancing across the league, it's hard to tell exactly what happened. The big gainers were the Rays (up nearly 13%) and the White Sox (up 6%), which perhaps suggests that the last week's games made the A's and Angels each less likely to win the Wildcard.
Of course, this is all mostly useless. What really matters is the games on the field. And as of this moment, the A's are beating the Angels 2-1 in the top of the sixth. This week's games should tell us a lot about the A's chances. They've got three games at LAnaheim and then four at the White Sox. That's seven straight games against division leaders.
Let's Go A's!