Editude said:
The columnist should be among the best reporters on the staff. That means gathering information, not just firing off from the comforts of the couch. It doesn't mean going to all the games, if there are other ways to back up opinions, but it does help to be a presence as well at various sites and levels.
I don't think it's the columnist's role to gather information, there are beat reporters who fill that role. I've worked with columnists who
did break news as a result of relationships they had built with powers-that-be outside the locker rooms. But I believe their primary purpose is to comment.
Now as to informed opinions, I think there are various ways to achieve being informed, not all of them including working the locker room. A good beat writer is going to be using the phone a lot, and so is a columnist. A good columnist in a market with a lot of pro and college teams is going to be humble enough to realize he's a generalist, and he's going to rely on beat writers to brief him and sometimes feed him stuff. I don't have a problem with a columnist writing from home as long as he's giving me more substance than can found on talk radio, in other words not just writing off the top of his head but doing some research.
I think it's not required that restaurant critics and theater critics and op-ed pundits show up every time they write something critical, but the locker room is a more macho environment and sports columnists do look bad if they fail to show up after an especially scathing piece, one that questions someone's integrity or courage or whether the coach or athlete ought to remain employed. If the columnist just writes that someone had a bad game or made a bad call, I don't think it's necessary to show up the next day.