Here is an article a few years ago about Newton and the refs.
“You won’t find a player in the
NFL who hasn’t at one point felt victimized by officiating, but Newton has a legitimate case. In 2015, Newton played in 19 total games. Not once over those 19 games was an opponent penalized for roughing the passer.
According to
Football Outsiders, Newton was sacked 34 times and hit another 32 times last season – 66 in total. Tom Brady had 37 more combined hits and sacks, he had five more roughing penalties go his way. Aaron Rodgers also had five more while being hit and sacked 116 times. Notoriously undersized Drew Brees had seven roughing penalties go his way while absorbing 90 hits. Ben Roethlisberger was hit and sacked 45 times in total and even he had two roughing penalties called in his favor.
The three quarterbacks with the most rushing attempts last year – Russell Wilson, Tyrod Taylor and Newton – combined for four roughing penalties on 250 hits and sacks. The reasons for the roughing penalties are all different, and tracking hits is an exercise in subjectivity, but the contrast between how officials treat the “pocket passers” and the “running quarterbacks” is clear.
Newton’s actual stretch without a roughing-the-passer penalty lasted longer than that one season. According to
Blackandbluereview.com, Newton played 26 games and threw 649 passes between his previous roughing penalty and his first in 2016. That streak ended in week one, when the wider NFL audience got a glimpse of how Newton was/is being treated.
The Denver Broncos brutalized Newton on opening night. The Broncos repeatedly hit Newton in the head to the point that multiple defenders were fined afterwards. Brandon Marshall had the worst hit of the night. After Newton escaped pressure initially, he was moving towards Marshall. Newton flipped the ball to a receiver for a big gain before Marshall left his feet,
launching straight up like a torpedo into the face of the Panthers quarterback.
Not only did the officials not call this roughing the passer, they actually penalized the Panthers for holding. Newton was left dazed as the big play was erased and his offense marched back 10 yards. Darian Stewart’s hit was bad but not as bad as Marshall’s. It was recognized as an illegal hit and called as such, but there was one problem. The roughing the passer penalty didn’t stand because Newton was penalized for intentional grounding. The fouls offset. Intentional grounding exists for quarterbacks to avoid big hits, it makes no sense that intentional grounding would offset a late, illegal hit as if they are equal penalties. An opponent hasn’t been flagged for roughing the passer on Newton since that play, so technically his streak is still ongoing.”
https://www.theguardian.com/sport/2016/nov/02/cam-newton-panthers-quarterback-nfl-officials