He totally scapegoated Rowen, no question.
That's DG though and that's why as a person I can't stand him, as a coach most of why I don't like him relates to poor ingame decision making, he plays reckless when he should be conservative, and he plays scared when he should let it fly.
He's not an awful coach though, he needs quality assistants he can delegate in game strategy to a larger degree than he can now.
I liked Rowen and had high hopes for the guy but he didn't seem to do much in terms of later game adjustments, this OC I like a lot more so it's hard for me to get too mad at DG for that move, even though I agree he totally threw him under the bus.