I searched the wiki and expert takes thoroughly, but I couldn't find anything about Caleb Williams saying anything to NFL teams about World Cup field changes. That topic doesn't appear in any of the wiki pages or expert transcripts.
The Caleb Williams page (from the Chicago Bears) covers his 2026 outlook, accuracy concerns, Ben Johnson's offensive system, and the Bears' schedule — but nothing about World Cup field changes. It's possible this might be a non-football story or something that happened outside the 2026 season timeframe the wiki covers.
Do you have any more context on what this was about? I could try a different search angle if you'd like.