It was unfathomable as recently as three weeks ago.
However, their ascendance does not mean they have solved all of the problems that plagued them early in the season.
Getting to the top of the division—and more important, staying there—is an ongoing process. All that they improved upon during the last three weeks has to be maintained. Everything that they currently lack—such as health and steady starting pitching—they have to get.
It is just over a month until the All-Star break. By that point last year, Boston had overcome an 0–6 start and was 20 games above .500 (55–35) and leading the division.
If the Red Sox want history to repeat itself in that regard, the following five areas of the game will be very important.