Where are you finding this information? The final stats on the athletics department website show J.D. Spraque (#99) as a defensive starter and Porter listed as #5D. I thought we ran a nickel defense to start with two LBs -- Keith Moore as a starter with Poling. It could've been Daugherty who I thought rotated in later -- he isn't "#5D", but he is #50.
Yes, that is where I found it. 99 is actually Laseak, so I ignored the "J.D. Sprague" as a defensive starter, and assumed that the number was right, not the name.
Porter is 54, and he definite did play. Daugherty is listed as playing, but not starting. You could be right that Daugherty started, and Porter played, rather than the reverse. That would actually make more sense. I noticed the extra corner, but I never noticed three defensive tackles in at once.