Don Mattingly was one of the premier players in the Majors during the mid-1980’s. The 1984 American League Batting Champion and 1985 MVP had a solid 1987 season where he batted a solid .327 with 30 home runs and 115 RBI. While earning the Gold Glove and Silver Slugger Awards, Mattingly also had a unique year in terms of power in 1987. While his 30 home runs were not a career-high, he managed to hit six grand slams, which accounted for all of the grand slams he would hit in his career.

Mattingly’s six grand slams in 1987 would set a then-Major League single-season record, which has since been tied by Travis Hafner in 2006. Mattingly also surpassed the legendary Lou Gehrig, who had previously held the Yankee record with four. Mattingly wore this offered New York Yankees road jersey during the 1987 season and has been photo matched to the August 9, 1987 game where he hit one of his 30 home runs. Mattingly hit his fourth and fifth grand slams of the 1987 seasons while on the road – the fourth on July 16 and the fifth on September 25, which broke the Yankees’ record for grand slams in a single season and tied the American League mark set by Jim Gentile in 1961 and Jim Northrup in 1968.

Mattingly’s gray New York Yankees button-down road jersey was manufactured by Wilson and is a size 42. “NEW YORK” is in block letters, sewn on across the chest in navy and white tackle twill. Mattingly’s number “23” is sewn on the back in the same navy and white tackle twill. The Wilson tag is sewn on the bottom front left tail with a “42” flag attached. The inside back collar has a gray rectangular strip of gray knit fabric that has “Mattingly 87 2” embroidered in black. This jersey displays excellent game use, showing that it has been washed many times with signs of puckering on the letters and numbers, along with loose threads. This jersey comes with a LOA from Sports Investors Authentication (190813C1), who have photo matched this jersey to the August 9, 1987 game and multiple others. Sports Investors has also determined that this jersey was worn and washed many times. Sports Investors has also concluded that “While we were not able to confirm through media, there is a very high likelihood he wore this jersey in one or both grand slam games. Sports Investors Authentication has photo matched three different Yankees jerseys from the 1987 season. In each one of these three different Yankees jersey, the set 1 jerseys were photo matched to games in the first half of the season. The other two jerseys we matched were set 2 and matched to games in the second half of the season. Which supports why there is a very high likelihood this was worn in his fourth and fifth grand slams games that season.” This jersey also comes with a LOA from MEARS (316398), who have graded this jersey a perfect A10.

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