MIAMI -- The Marlins won't be retaining Dan Jennings in a front-office role after all, ending a 13-year association with the team that included an awkward move in May from general manager to manager.
The Marlins confirmed the firing Thursday hours after they reportedly hired Don Mattingly as manager.
Team officials said after the season that Jennings would resume his old job, and he was under contract through 2018 and reportedly owed $4.5 million.
But he didn't return to the front office and hadn't been involved in offseason decisions. He had long been close to owner Jeffrey Loria, but their relationship soured after Jennings moved to the dugout.
Team president David Samson said he proposed firing Jennings, and Loria agreed.
President of baseball operations Michael Hill will handle the responsibilities of GM, as he has done since Jennings gave up the job.
"I just thought the way it was running since the middle of May was the way it should continue to run," Samson said. "The ideas that Michael has as to how to turn this around are ideas that I think are right."
Jennings was the first major league skipper with no experience as a manager or big league player since Braves owner Ted Turner managed his team for one game in 1977. He had worked with Hill on the Marlins' personnel side since 2002.
"It was sad for me and Michael," Samson said. "When you've been working with people for a long time, it's tough. But Dan agreed it was a heck of a run. We won a World Series together; we finished in last place together."
Jennings became manager when Miami fired Mike Redmond after a 16-22 start. The change failed to spark a turnaround, and the Marlins finished 71-91.
The move to fire Jennings comes the same day the Marlins reportedly hired Mattingly as manager. Mattingly was added less than a week after he parted with the Los Angeles Dodgers, according to multiple reports.
Information from The Associated Press was used in this report.