The Arizona Diamondbacks' slide continued with an ugly three-game sweep at the hands of the Chicago Cubs this week. Arizona is now 16-17, back under .500, with numerous concerns and questions floating. The D-backs are simply not playing good baseball at the moment, but will finally return to Chase Field after an off day Monday. Here's what the three-game sweep means for the D-backs, and the big question that now arises as a result. What D-backs' sweep vs Cubs told us 1: Top-order struggles dampening D-backs offense May 3, 2026; Chicago, Illinois, USA; Arizona Diamondbacks second baseman Ketel Marte (4) reacts after striking out against the Arizona Diamondbacks during the seventh inning at Wrigley Field. Mandatory Credit: Patrick Gorski-Imagn Images | Patrick Gorski-Imagn Images The D-backs have had one of the tougher lineups in baseball for several seasons, but it certainly has not looked that way of late, and it starts with the top of the order. In three games, Arizona was outscored 16-9.…