Hey Man, he is the head coach. He took his team from the 8-8 doldrums to the heights of 12-4. Won four more games than last year, by doing less. All the other candidates for this, did more. Therefore Garrett should win.
Four more wins than last year. With only a few breaks here and there, last year's team could have done that too. And the year before. And the year before.
Same amount of games in both seasons?
Orrrrrr.... Maybe it makes sense to let your star RB who's always averaged at least 4 yards a pop, to vastly increase his touches? That qualifies! The RB, that is.
Murry actually has a better case for league MVP.