"He was a leader who was believable, a man of high character who always had a plan," Miller said in the letter,
which was published Tuesday at MMQB. "He used to assign me what I call side missions — after team meetings he’d pull me aside and tell me what he needed from me that day, whether it was raising the intensity level at practice or heightening the focus on the details. I was excited and proud to be called on."
"Kubiak, a former quarterback, knows quarterbacks," Miller wrote. "He knew he had to bench Peyton Manning for Brock Osweiler during the regular season a year ago in order to get Peyton fully healthy for the playoffs. And he knew when to insert Peyton back into the lineup. It all worked because Kubiak always has a plan. He’s not the sort of man who throws something against the wall and waits to see what the outcome will be. He always forecasted his moves and knew exactly what he wanted to happen."