It was a game players called "ugly" and "embarrassing."
Team president Matt Millen declined to comment on whether Mariucci's firing was imminent or whether there would be a meeting soon to discuss his future, the Detroit Free Press said.
But, Mariucci accepted responsibility for the state of the team -- all but officially out of the playoff race at 4-7 -- and players openly wondered what was next.
"I don't know what's going to happen or anything like that, but nobody's stupid in here," offensive lineman Damien Woody said.
"There's a lot to do, and it starts with me, and I accept that responsibility," Mariucci told reporters at a post-game news conference.
Asked if he thought he could turn things around, he said: "Yeah. I do."