Cooper Hjerpe called up, delivers 4 perfect innings in MLB debut
St. Louis Cardinals No. 18 prospect Cooper Hjerpe was promoted to the majors and impressed immediately with a flawless debut outing.
The Cardinals called up left-handed pitching prospect Cooper Hjerpe for his MLB debut. Hjerpe responded with 4 perfect innings, contributing to a Cardinals win. The outing marks a significant roster addition for St. Louis, with a top-20 prospect now on the active roster. His strong debut performance suggests he could factor into the Cardinals rotation or bullpen going forward.
More on the Cardinals wire.
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