It might be hard to believe that a team with an 11-20 record at home is a playoff contender, but there are some other factors that make it a distant possibility. They started off 0-10 at home, and have gone 11-9 since. They are 20-16 one the road, which is the 2nd best in the division.
They are in a weak division where it is possible that no one runs away with it (and might be one of those rare divisions where 85 games might win it). Their pitching has gotten better each month (although their hitting needs to improve a lot. It is a longshot, but they are only 4.5 games out of first place and no one show any signs of taking over.