The Arizona Diamondbacks lost another series — this time dropping two of three to the Texas Rangers at Globe Life Field. The Diamondbacks struggled to hit, Zac Gallen struggled to pitch, and Paul Sewald's first blown save of the year came at an inopportune time. Here's what we learned from another poor overall performance by Arizona, and one big question that remains: What D-backs' ugly series loss to Rangers told us 1: Too many wasted offensive opportunities May 13, 2026; Arlington, Texas, USA; Arizona Diamondbacks second baseman Ketel Marte (4) slides into third base during the third inning against the Texas Rangers at Globe Life Field. Mandatory Credit: Jerome Miron-Imagn Images | Jerome Miron-Imagn Images The Diamondbacks just cannot seem to get out of their own way offensively. They've struggled against quality pitching, yes, but the Rangers did offer plenty of opportunities for the D-backs to capitalize — they simply could not.…