From 7/27-8/31, the Indians had a winning percentage of .152. This would have qualified them as the second worst baseball team of all time, behind the Spiders. They had losing streaks of 11, 9 and 6 games during that period. That month projected out to a full season would have done the trick. We all know one month does not a season make, but I think it's pretty clear that the month of August is who this Indians team is.
They appear to be turning it around over the last three games with a blistering .666 winning percentage though, so there may be hope yet.