Interesting article about Fields and Fitz. Pretty standard info but it sounds like Fitz and Nagy have a close relationship which probably decreases the likelihood of Fitz wanting to replace Nagy in the next few years if(when) Nagy is fired.
https://www.nbcsports.com/chicago/bears/bears-consulted-pat-fitzgerald-drafting-justin-fields
https://www.nbcsports.com/chicago/bears/bears-consulted-pat-fitzgerald-drafting-justin-fields