Moreno exited Sunday's game against the Brewers with left adductor tightness, Jesse Friedman of GoPHNX.com reports.
As Friedman notes, it's the same injury that Moreno just returned from last week. The extent of his latest setback is uncertain, but this is potentially a big blow to an Arizona team primed for the playoffs. Even if Moreno doesn't need to go on the injured list, the team could bring Adrian Del Castillo back up for catching depth over the final week of the regular season.