The Arizona Diamondbacks came out of Milwaukee with a much uglier run differential than they did record. In a 2-1 series loss, the D-backs were outscored by a margin of 28-9.

That type of performance is, of course, concerning, though there were also some positives to glean .

Below is what this series told us about the D-backs, and the question that now burns as a result of the ugly series loss:

What D-backs series loss to Brewers told us

1: Starting pitching is officially a major concern

Apr 21, 2026; Phoenix, Arizona, USA; Arizona Diamondbacks pitcher Merrill Kelly in the first inning against the Chicago White Sox at Chase Field. Mandatory Credit: Mark J. Rebilas-Imagn Images | Mark J. Rebilas-Imagn Images

D-backs starters had been getting the job done for the most part early in the 2026 season.…