The second-year NFL assistant was let go after a dismal year from rookie quarterback Blake Bortles, who finished light-years behind any other passer in this year's total quarterback ratings.
Bradley told the media on Tuesday that he had some "philosophical differences" with Fisch.
"I think that there was some just differences, just as far as how we want to go about things ... as far as, 'Hey, we want to put on Blake's plate to do a lot. Let's throw a lot at him, and then he'll be able to carry that over to the next year,' or, 'Let's not put a lot on his plate and let him grow through this.'
"Which way is best? I don't know. I know the way we kinda want to do it. That would maybe be somewhat of an example (of differences between the two)."
If Bradley is looking to make an impact signing, there may be no more significant one than Trestman. (When asked Tuesday if he had thought about reaching out to Trestman yet, Bradley said he had not.) Despite his recent issues in Chicago, he might be a breath of fresh air for Bortles and the rest of the offense.