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Codify on X: Don Mattingly, grand slams hit per year: 1982 - 0 1983 - 0 1984 - 0 1985 - 0 1986 - 0 1987 - 6 (set a single-season MLB record) 1988 - 0 1989 - 0 1990 - 0 1991 - 0 1992 - 0 1993 - 0 1994 - 0 1995 - 0 / X
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John Racanelli – SABR's Baseball Cards Research Committee
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Don Mattingly Baseball New York Yankees Sports Trading Cards for sale
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How would someone who grew up watching Major League Baseball in the 1950s feel about the present game? - Quora
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Uncle Mike's Musings: A Yankees Blog and More: Happy 100th Birthday, Fred Caligiuri!
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Don Mattingly, Mark McGwire 1990 Fleer A.L. All Stars Super Star Specials #698 - New York Yankees, Oakland Athletics at 's Sports Collectibles Store
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Don Mattingly Baseball Sports Trading Cards for sale
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Uncle Mike's Musings: A Yankees Blog and More: Happy Birthday, Princeton University!
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Topps Don Mattingly Baseball Sports Trading Cards & Accessories Rookie for sale
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Topps Don Mattingly Baseball Sports Trading Cards & Accessories Rookie for sale
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Topps Don Mattingly Baseball Sports Trading Cards & Accessories Rookie for sale
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just four teams
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This Day in Yankees History: Mattingly hits sixth grand slam of the '87 season - Pinstripe Alley