Whitehurst replaced an injured Matt Hasselbeck in the fourth quarter and was 4-of-8 for 51 yards in Sunday's loss at Pittsburgh. He could start Sunday against Jacksonville if Hasselbeck remains sidelined with a sore neck.
Andrew Luck isn't expected to return from a lacerated kidney and abdominal muscle injury until at least Week 15, according to NFL Network, so Whitehurst would get the nod this week if Hasselbeck is out.