Gray (elbow) is scheduled to make the third appearance of his rehab assignment Tuesday with High-A Wilmington, Mark Zuckerman of NatsJournal.com reports.
Vivas went 3-for-5 with two RBI, a run scored and a strikeout during a 13-3 win over Colorado on Monday.
Lile went 3-for-5 with a three-run homer, five RBI, a double, a stolen base and two runs scored during Monday's 13-3 win over Colorado.
Cavalli (12-5) earned the win after allowing two runs on five hits and one walk through six innings. He struck out seven.
Thaiss signed a minor-league contract with the Astros on July 24.
The Astros signed Velazquez to a major-league contract Monday, Matt Kawahara of the Houston Chronicle reports.
Delgado was optioned to Triple-A Sugar Land on Monday, Chandler Rome of The Athletic reports.
Chaparro is out of the lineup for Monday's game against the Rockies.
Abrams (ankle) will start at designated hitter and bat leadoff in Monday's game against the Rockies.
Wood (oblique) has extended his flat-ground throwing to 120 feet and has resumed hitting off a tee, Danielle Allentuck of The Washington Post reports.
