Velazquez was release by the Astros on Thursday, Chandler Rome of the Houston Chronicle reports.
Velazquez was reassigned to minor-league camp Friday, Brian McTaggart of MLB.com reports.
Velazquez (COVID-19 protocols) made his Grapefruit League debut Sunday, tossing a scoreless ninth inning in the Astros' 5-0 win over the Nationals. He struck out two and worked around a hit and a walk.
Manager Dusty Baker said Friday that Velazquez is away from the team due the league's health and safety protocols, Chandler Rome of the Houston Chronicle reports.
Velazquez was traded from the Orioles to the Astros on Wednesday in exchange for a player to be named later, Jon Meoli of The Baltimore Sun reports.
Velazquez cleared waivers, was outrighted to Triple-A Norfolk and was also removed from the Orioles 60-man pool Friday.
The Orioles optioned Velazquez from their big-league summer camp site to their alternative site in Bowie, Jon Meoli of The Baltimore Sun reports.
Velazquez was claimed off waivers by the Orioles on Sunday.
The Red Sox designated Velazquez for assignment Thursday.
The Red Sox recalled Velazquez from Triple-A Pawtucket ahead of Sunday's 4-3 win over the Angels. He tossed a scoreless seventh inning and secured his first hold of the season in the outing.