Donald Arthur Mattingly (born April 20, 1961)[1] is an American former professional baseball first baseman, coach, and current manager for the Miami Marlins of Major League Baseball (MLB). Nicknamed "The Hit Man" and "Donnie Baseball", he spent his entire 14-year career playing with the New York Yankees and later managed the Los Angeles Dodgers for five years.

Mattingly graduated from Reitz Memorial High School in Evansville, Indiana, and was selected by the Yankees in the 1979 amateur draft. Debuting with the Yankees in 1982 after four seasons in Minor League Baseball, he emerged as the Yankees' starting first baseman after a successful rookie season in 1983. Mattingly was named to the American League (AL) All-Star team six times.