Villarroel was traded from the Astros to the Giants in exchange for Kai-Wei Teng on Thursday, Chandler Rome and Andrew Baaggarly of The Athletic report.
The Giants needed to clear a spot on their 40-man roster after signing Harrison Bader, which was the motivation for this deal. Villarroel reached High-A in 2025 and batted 276/.306/.362 in 15 games, and it's unclear if he'll hit enough to be a productive big leaguer given his lack of defensive value.