Hardball Times: First Half Brewer Review
"The Brewers, like many teams, have their share of underachieving and overachieving players. Still, enough of their success looks legitimate that there's no obvious reason to expect them to decline dramatically, provided they can stay mostly healthy. They seem unlikely to top 95 wins this season, but 88-90 wins are very much within their capabilities. It will likely be up to the rest of the NL Central to catch up to them—and are any of the other NL Central teams capable of 90 wins?"
At this point, the Cubs would have to finish 39-26 for 90 wins. That's a .600 winning percentage. I wouldn't expect it but it wouldn't be impossible, either.
It's going to be an interesting race for the NL Central, in my opinion.