Peguero has been shut down for the season due to a recurring left hamstring injury, Justice delos Santos of The San Jose Mercury News reports.
Peguero has been out since late May, and he didn't retire a batter in either of his rehab appearances with Triple-A Sacramento this month. It's unclear whether surgery is a possibility, but either way Peguero's 2026 campaign is over. He'll finish with 2.38 ERA and 5:4 K:BB over 11.1 innings for the Giants.