DENVER -- Rockies assistant general manager of player development Zach Wilson, a 20-season front-office member who was in his seventh season in charge of the Minor League system, resigned on Tuesday, according to Major League sources.

Chris Forbes, Colorado's assistant director of player development, will assume Wilson’s duties. The club has not officially announced Wilson's resignation or Forbes' appointment.

Forbes has been with the club since 2007, with a deep background in scouting and player development. Before that, he coached at the collegiate level.

It's the latest move in a season full of front-office changes for the Rockies. Jeff Bridich stepped down as general manager on April 26, with Bill Schmidt moving from vice president of scouting to interim GM. Assistant GM for player personnel Jon Weil, who oversaw pro scouting operations, mutually parted ways with the club last Thursday.

Wilson began with the Rockies in the amateur scouting department and rose to assistant scouting director, before becoming Bridich’s assistant with the farm system in 2011.