Petersen, who had a rough outing on July 3 against the Brewers, made his MLB debut in May and holds a 2-0 record with a 4.66 ERA in 9.1 innings.
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Petersen, who had a rough outing on July 3 against the Brewers, made his MLB debut in May and holds a 2-0 record with a 4.66 ERA in 9.1 innings.