Montero (lat) is listed among the Astros' available relievers for Sunday's Grapefruit League game against the Nationals, Brian McTaggart of MLB.com reports.
He'll be pitching for the first time this spring after he was a delayed arrival at camp due to a visa issue. Montero missed the final two months of the 2021 campaign with a right lat strain, but after a full offseason of recovery, the 31-year-old is believed to be healthy heading into Opening Day. He'll likely serve as a middle reliever for Houston during the upcoming campaign.