Gregerson will be unavailable out of the Astros' bullpen for Thursday's game against the Diamondbacks, Angel Verdejo Jr. of the Houston Chronicle reports.

EDGE Analysis

Gregerson pitched in four of the past five games prior to Thursday's contest, picking up three saves during that span while allowing his fourth blown save of the season Wednesday. The Astros will likely send out Ken Giles or Will Harris to the mound in the event of a save situation, according to what the matchups dictate.