Ryan Dewitte Jackson (born November 15, 1971) is an American professional baseball coach and a former Major League Baseball first baseman and outfielder who played for the Florida Marlins, Seattle Mariners, and Detroit Tigers between 1998 and 2002.

He set career-highs in games played, at-bats, home runs, and RBI that year.

Released after the 1999 season, he signed with the Tampa Bay Devil Rays and spent the entire year with Triple-A Durham.

[4] Jackson began his coaching career at the minor league level in the Cincinnati Reds' organization.

In January 2019, he was named field coordinator for the Boston Red Sox' player development system.