I have a hard time using last year's stats as a barometer. He was a true first year rookie and two of his worst games were in NFL start #6 and #10. And how do you explain his stats for the games where it was under 20 degrees? His QBR for the year was 63. In games that year where the wind chill temp was under 20 degrees, his QBR was 74.2. So do we say he plays better in frigid conditions? I wouldn't. Based on sample size and the fact that he was an NFL rookie, I really don't think you can draw any conclusions about how he plays in cold weather. If anything, I would be more inclined to look at this year where he was an overall QBR of 81.9 and a QBR of 81.1 in cold weather games (temp with wind chill 40 or below) and say he play the same.