Went with Sobotka for how he just steadfastly refused to give a **** and somehow never got benched or even really ever got his ice-time cut all that much. Perks of being a veteran member of the Buffalo Sabres country club.
Second place is definitely Leino.
Honorable mention to Bogo outside of the end of the 2014-2015 season. Every ****ing year, it was, "Zach's excited to be back and healthy, he'll be a big part of our defense. He's big, strong, and fast."
Five minutes later: he's out for a month after taking a routine hit or blocking a wrist shot.
Even more than the injuries, Bogo was just incredibly frustrating to watch in terms of being quite possibly the dumbest veteran defenseman I've ever seen. I remembered hearing after the trade that Enstrom had to literally direct him around the ice and tell him where to go/what to do in a lot of situations, and he seemingly never developed his hockey IQ at all during his time here.