That post where he says "I need a coach too", just seems really out of place for a mafia to say.
Since everyone has been talking like scum can talk during the day, and nobody had really mentioned otherwise (at least not enough for someone skimming to notice), I would gather one of two things.
A) mafia can talk during the day and he isn't mafia
B) he is mafia but mafia can't talk during the day
However, saying B would be quite a risk to take since he would be giving out info about his team (when everyone else would be saying otherwise) I can't imagine that being the case.
There is a third alternative, but it would require him being more experienced (this scenario would also be scum).
Not much of a significance though since he is a noob and hasn't really contributed in any way.