Gregerson will leave the team Wednesday to be with his wife as she goes into labor, Brian McTaggart of MLB.com reports.

EDGE Analysis

The Astros have not officially made a move, but it's entirely possible, even with expanded rosters, Gregerson winds up on the paternity list. If he does, Gregerson could remain on leave for up to three days. Pat Neshek, who has posted a 3.16 ERA, 0.97 WHIP and 28 holds this season, is a logical candidate to step into the closer role in Gregerson's absence.