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Progressive Walks per 9IP Leaderboard

This table is a snapshot of the career, single-season, active, and yearly leaders at the end of each season.

* - Indicates Hall of Fame Bold - Indicates active player

Year	Career	BB9	Single-Season	BB9	Active	BB9	Yearly	BB9
1952			Kasey Cook	1.20			Kasey Cook	1.20
1953			Kasey Cook	1.09			Kasey Cook	1.09
1954	Michael Sturges	1.56	Kasey Cook	1.07	Michael Sturges	1.56	Kasey Cook	1.07
1955	Michael Sturges	1.56	Kasey Cook	1.07	Ruben Ibarra	1.80	Rene Muņoz	1.28

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