I think that Milwaukee team finished fourth, with a losing record.
Detroit started about 40-10 one year in the 1980s when they won the pennant.
In baseball, it is almost impossible to win a lot in a row or lose a lot in a row because there are no heavy favorites. If the worst team in baseball is playing the best team, the worst team will be favored if their #1 starter is going against the other teams #5 starter and the game is being played at home. There is no situation comparable to that in any other sport.
Yup, according to the link, the Brewers finished the season at 91-71 and third place in the AL East.
1987 was like a tale of three seasons for the Brewers. They started the season 13-0 and 17-1 and were 42-43 at the ASB, but they still finished with a respectable record.