So Fields has this caliber of game the rest of the year: 309 passing yards, 4 TDs, 1 INT, 9.7 YPA, 129 QB rating, 41 rushing yards? (average of those 2 games). Maybe depress the numbers a bit to account for quality of competition, 260 yards, 2 TD, 0-1 INT, 8.5 YPA, 117 QB Rating.
I think its pretty obvious you keep Fields at that point because those are legit All-Pro numbers similar to Mahomes. Not going to happen, Fields will continue to be who he is, showing flashes against some teams, looking perplexed and overwhelmed against others. But yeah if he did that, QB is off the table in the draft and you immediately extend him.