According to ESPN’s Don Van Natta Jr and Seth Wickersham, Silver immediately declined.
— Don Van Natta Jr. (@DVNJr) November 17, 2017
[NFL Commissioner Roger Goodell] knows that there’s no clear successor, which is both a failing on his part and a source of leverage.
“The owners, though, have considered other successors. A confidant of one owner reached out to gauge whether Adam Silver, the NBA commissioner, would be interested in running the NFL, to which Silver immediately said no.