Kevin Lee Seitzer (born March 26, 1962 in Springfield, Illinois) is a former Major League Baseball player for the Kansas City Royals, Milwaukee Brewers, Oakland Athletics, and Cleveland Indians.

Seitzer made his big-league debut as a September call-up in 1986 with the Royals. He made it to the majors to stay in 1987, where he started the season as the Royals' regular first baseman. He traded positions with Hall of Fame third baseman George Brett later in the season, in hopes of reducing Brett's chances of injury. Seitzer hit .323 with 15 home runs and 207 hits in his rookie 1987 season and, though overshadowed by fellow rookie teammate Bo Jackson, he was selected to the American League All-Star team.

After subsequent seasons of .304, .281, .275, and .265, the Royals released Seitzer during spring training in 1992. He signed with Milwaukee, who installed him as their regular third baseman. Seitzer made the All-Star team again in 1995 but never again matched the success of his 1987 season.

The Cleveland Indians acquired Seitzer in late 1996 to help with their pennant drive. In two postseason appearances with Cleveland, mostly coming off the bench, he hit .192 with a double, one run scored and four runs batted in. He retired following the 1997 season with a career batting average of .295.

Seitzer now runs a baseball training facility in Kansas City, Missouri with former Royals teammate Mike MacFarlane .