He later joined the Kansas City Royals in 1969, becoming its scouting director in 1984, before serving as senior advisor to the general manager from 1997 until his death.

Twenty-eight players coached by Stewart eventually signed professional contracts, drawing the attention of the New York Yankees.

Working as the organization's Midwest scouting supervisor,[1] the first player Stewart discovered and steered to the Yankees was pitcher Jim Bouton, who had not attracted any interest from major league teams while in high school.

They include Bo Jackson, Kevin Appier, Brian McRae, Mike Sweeney, Johnny Damon, Joe Randa and Carlos Beltrán.

[11] He was inducted into the Kansas City Royals Baseball Hall of Fame on June 28, 2008,[12][9] becoming the 23rd member of the elite group.

[2] Stewart co-authored a book, The Art of Scouting, with Kansas City newspaper writer Sam Mellinger in 2014.

[13] In an interview with Dick Kaegel of MLB.com on October 17, 2014, as the Royals advanced to their first World Series appearance since 1985, Stewart recounted a story from his Chicago childhood: "When I was 8 or 9 years old, playing ball as a kid, my mother said, 'You know, you're going to be in professional baseball someday.'