It is in the link you posted.
The Browns at one point had their top three centers – Nick Harris, Ethan Pocic and Michael Dunn – all on Injured Reserve (and a fourth, rookie Dawson Deaton, was on IR from the preseason). Froholdt was forced to start four games at a position he had never played.
He had 7 sacks, tied for 1st in the league and 5 penalties, 13th in the league. on 592 snaps. Sorry, I don't have a link, this came from another poster. This might not be as important as the fact that the Browns won three of the four games, he started but is it possible other players were factors in the Browns winning and not that Froholdt started at center. I know the Browns are a pathetic organization, but it is hard to believe they would let a player go who was so important to their success.
I guess we will just have to disagree on this topic.