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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The Players - Page 8 - Baseball History - MVP Mods

Uncle Mike's Musings: A Yankees Blog and More: Top 5 Reasons You Can't Blame Roger Clemens for Throwing a Bat at Mike Piazza in the 2000 World Series

Count Bassy🧟‍♂️ (@thekrankycamel) / Twitter

John Racanelli – SABR's Baseball Cards Research Committee

Don Mattingly Baseball SCORE Sports Trading Cards for sale

Don Mattingly Baseball SCORE Sports Trading Cards for sale

Count Bassy🧟‍♂️ (@thekrankycamel) / Twitter

The Players - Page 8 - Baseball History - MVP Mods

Don Mattingly Price List - Supercollector Catalog

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