Yeah been a lot of reports and comments that Hartnell is "having a hard year off the ice" so I guess marital is the most likely, but really we don't know
Well, a lot of people know. But, suffice to say, it is the reason for his poor play. He just is having a really rough time and can't get his mind past it. It's really ruined his entire season. It sucks when you need to go through stuff like that.