Fused vertebrae is going to cause you to deteriorate rapidly. Manning started losing arm strength rapidly after year 1 in Denver. I’m surprised LVE even played this long since the surgery, mainly because he’s a LB and you got to move forward to tackle and as another poster surmised in a comment and I wouldn’t be surprised if it’s accurate, he tackles by turning sideways to avoid the neck issue.
that being said, that first clip of Parsons attacking the offensive player was more a testament of how ridiculous he is…