16/33 249 YDS, 1 TD, 2 INT's, 7.55 YPA
14/29 142 YDS, 1 TD, 2 INT's, 4.90 YPA
17/29, 189 YDS, 1 TD, 0 INT's, 6.52 YPA
Total: 51.6 completion %, 6.37 YPA, 3 TD's/4 INT's
18/31 145 YDS, 0 TD's, 3 INT's, 4.68 YPA
20/27, 179 YDS, 0 TD's, 2 INT's, 6.63 YPA
21/34, 181 YDS, 0 TD's, 2 INT's, 5.32 YPA
Total: 64.1 completion %, 5.49 YPA, 0 TD's/7 INT's
I left out a handful of games with poor statistical performances due to them being wins where each QB made a few big plays (at NYG in 06, at OAK/vs. WAS in 17) but these are the 3 worst games from Romo in 06 and Prescott last year. I also left out the Atlanta game for obvious reasons.
So can we stop comparing a 2nd year Prescott with a 4th year Romo as if they are the same thing, especially when Romo put up plenty of his own stinkers, including a game at home vs. Philly that cost us the division that was very similar to Prescott's performance vs. Seattle?
And this is despite the fact that he had a better supporting cast, 06 Owens/Glenn were much better than 17 Dez/Williams despite their age, 06 Witten vs. 17 Witten is no contest, and 06 Jones/Barber were far superior to what we had at RB without Elliott. The only offensive unit that was arguably better for Prescott was the OL and even that is a toss-up with Smith out.
The fact of the matter is that Prescott was more or less playing at his 2016 level until everything went sideways with Smith, Elliott, and to a lesser extent Lee. Over the first 8 games of the year he put up 16 TD's/4 INT's (and another 4 rushing), 1818 YDS on 63% completion % and 7 YPA. He was on pace to more or less match 2016 statistically with a lower, but still pretty good YPA and completion % but with significantly more TD's and only 8 INT's.
Everything went to shit and you can blame Prescott for not being able to adjust, for perhaps being lulled into a false sense of complacency or being spoiled with his supporting cast, but the fact of the matter is that he was generally playing at the same level as he was in 2016 until Smith/Elliott went away.
There's also the very likely reality that many have to consider which is that Prescott may never be as good a QB as Romo but that he is still worthy of being the franchise QB for the next 10 years.