The Red Sox re-signed Bastardo on Thursday to a minor-league contract with an invitation to spring training, Francys Romero of BeisbolFR.com reports.
After missing the 2025 season following Tommy John surgery, Bastardo returned as a reliever in 2026 and collected a 4.64 ERA and 73:33 K:BB over 54.1 innings with Triple-A Worcester. The 24-year-old will compete for a roster spot in spring training.