Cleveland opened as a 7-point road underdog. The line has now moved to 9 points in favor of the Ravens in Week 17.
Mingo has appeared in 12 games and registered 42 combined tackles, two sacks and one fumble recovery.
"I don't know if he can make the transition," Dansby said. "It has to be within him. He has to look in the mirror and do that himself. I can only give him the keys. I can't make him drive."
Gilbert. the No. 8 overall selection in this year's draft out of Oklahoma State, has started only two of 14 games this season. He has totaled only 29 tackles and one interception while playing 375 snaps.
"It's tough man, it's tough," Dansby said. "It's not college. In college you have two or three years where you can play around. This is real life. Lot of people out here are fighting for jobs and fighting to feed their families. Justin is trying to make a transition and it's not easy, man, it's not easy. ... One of the hardest things to do at this level is be consistent.
"You'll have a guy come in and play two or three years and be out of the league and you'll never hear from him again. There are so many first-round picks that have done that. Second-round picks that came in for two or three years because they couldn't make the transition and were out of the league."
The Panthers racked up 404 yards of total offense in the game, mostly on the ground, but the Browns adopted a bend-don't-break defensive philosophy. They forced two turnovers in the game and one sack, en route to 11 Fantasy points in the loss.
The Browns have been mostly solid of late, riding strong pass rush to at least 9 Fantasy points in four of the last five. They will look to close the season out strong against the Ravens in Week 17.
Cleveland will face Carolina and Baltimore to end the regular season.