Well, I don't know how anyone could watch every minute of a golf tournament on tv. :)
As for your question, I don't know. I don't think watching it is sinful. I've heard a Traditional priest say before that The Masters would be a good family event to attend. So I wouldn't think watching it would be a sin. Ask a Traditional priest if you can.
Though, watching it on Good Friday is a bad idea. We are supposed to be mourning over Christ's Death that day.