If you can't expect them to sweep Oakland, then you certainly can't expect them to make the playoffs.
This is probably the easiest stretch of the season for us (KC-Oakland-Seattle), and there comes a point in the season when you look at the schedule and say, yes, they need to win these games. This is a series the Twins would have swept. Actually, it's a series most teams would have--Oakland has won something like 4 games out of the last 30.
We have lots of games against Boston, Tampa, New York, and the Angels coming up. Who really thinks we're not headed for total destruction in those games, especially considering how most people realize we're going to get swept by the Twins at the end of the season? I mean, this is a team actually thinks Ken Griffey is a major league center fielder, traded the farm for "Dirty .230" Swisher, does not have anything close to a fifth starter, and would have a losing record were it not for the stroke of luck that is Carlos Quentin.
If after all that you STILL somehow think this team can make the playoffs, the least you should expect is a sweep of the AAAthletics.