Colorado Rockies fans got the good news last week that Bill Schmidt was stepping down from his role as the club’s general manager. Under four years with him as the GM, the Rockies regressed from being just any other bad team to becoming one of the worst team’s in the history of baseball with 119 losses this season.

A week later, Rockies fans got the news that Schmidt’s assistant, Zack Rosenthal, was resigning.

Rockies assistant GM Zack Rosenthal, who has been with the organization for 21 years, has resigned from the club. Colorado is currently searching for a new head of baseball operations to replace Bill Schmidt.

— Mark Feinsand (@Feinsand) October 8, 2025

Rosenthal spent 21 years in the organization. He became the club’s assistant general manager after the 2014 season, and became the vice president of baseball operations following the 2021 season after Schmidt had the interim tag taken off his general manager role. He was also an assistant general counsel for the team and dealt with certain legal issues when they arose.

The decision was Rosenthal’s own, he told MLB.com’s Thomas Harding.

“I started as an intern in 2006. I feel incredibly lucky to have been able to stay with one single organization for 20-plus years. So many amazing experiences and memories.   My first full-time season was the World Series year [in 2007].  That was magical… I want nothing but success for the Rockies.  This city deserves a team that competes, because there’s nothing like Coors Field in October,” he said.

There was no statement from the Rockies following this move, but it goes hand-in-hand with their mindset of looking externally moving forward, something they said in the release following Schmidt’s departure. The combination of Rosenthal and Schmidt has resulted in some very poor baseball over the last four years, and an internal voice likely isn’t going to provide enough solutions to repair the immense amount of damage that has been done to the team. The team set the MLB record for the worst run differential (-424) and ERA amongst a starting rotation (6.65) this year, so getting new faces in the building is of the utmost importance if the organization wants any resemblance of the 2007 to come back.

Rosenthal’s future is still open.