Good stuff as always from John Clayton here, and based on his explanations I understand his grades.
I’d alter two myself.
The Texans’ finish and record were good despite missing the playoffs. But their consistent failures in the run game have to drop them to a B -- tops.
The Titans were more of a C-plus to me. Clayton praises them for digging out of 0-6 and gives them an F for the start, but allows the 8-2 finish to get them all the way back to a B-minus.