Cardinals prospect Cooper Hjerpe threw 4 perfect innings with 6 strikeouts in his MLB debut vs. the Rockies, earning the win in a 10-8 Cardinals victory — the 3rd-most perfect debut in modern MLB history. (Source: MLB.com, Sports Illustrated)
Cardinals’ Cooper Hjerpe Throws 4 Perfect Innings in Historic MLB Debut
Cardinals prospect Cooper Hjerpe threw 4 perfect innings with 6 strikeouts in his MLB debut vs. the Rockies, earning the win in a 10-8 Cardinals victory -- the 3rd-most perfect debut in modern MLB history. (Source: MLB.com, Sports Illustrated)