Lofty expectations did in Eric Mangini and Romeo Crennel, as their teams' seasons crumbled from high hopes to demoralizing finishes.
"You can't go 0-16 and expect to keep your job," Marinelli said.
Now two interim coaches who breathed some life into downtrodden clubs -- the Rams' Jim Haslett and the Raiders' Tom Cable -- await word on their fates.
Three NFL clubs fired coaches Monday, less than 24 hours after the regular season ended. Out were Marinelli, the New York Jets' Mangini and the Cleveland Browns' Crennel.
Only Mangini's firing came as a bit of a surprise. The Jets harbored Super Bowl aspirations after an 8-3 start that followed an offseason spending spree, including the trade for Brett Favre. But they didn't even make the playoffs, losing four of their last five games.
"I don't think it was one thing," owner Woody Johnson said. "We had to go in a different direction. There's nothing specific. It's just a call we made. Hopefully, it's correct."
The Browns' search to replace Crennel is already off to a disheartening start: Bill Cowher told owner Randy Lerner on Saturday that he doesn't intend to coach in 2009.
Cleveland was rewarded with five prime-time TV appearances this season after going 10-6 in 2007 and placing six players in the Pro Bowl. But the Browns collapsed to 4-12 amid injuries and didn't score an offensive touchdown while losing their last six games.
"Romeo was a gentleman through and through," Lerner said. "He was gracious to a fault."
The Lions became the first NFL club to go 0-16 with their loss to the Packers on Sunday. Marinelli won only one of his last 24 games.
Mike Singletary replaced Nolan and will be retained after the 49ers went 5-4 in their final nine games.
Cowboys owner Jerry Jones insists Wade Phillips will return as coach after Dallas, a preseason Super Bowl favorite, failed to make the playoffs -- and was eliminated in humiliating fashion in Sunday's 44-6 loss to Philadelphia. Phillips vowed Monday to do things differently.
"We know things must improve. The only way is to change things," he said. "To get to the standard we want, I don't see another way."
Cable went 4-8 after taking over the Raiders and ended the season with two straight victories, knocking the Buccaneers out of the playoffs Sunday. Haslett went 2-10 with the Rams.