I'm buying a Ben Rothlisberger #7 jersey for myself soon. I won't ride with it on, but I might play a game of catch with the neighborhood kids. Will I be an NFL poser?

Ask the bike teams if they appreciate the income they realize from selling team jerseys. In the big sports, merchandising's 3rd in income to ticket sales and T.V. If one supports pro biking i.e. would like to see it grow, it would make sense to wear team jerseys.

That being said, I don't own any, and I'd prefer a team T shirt that I could wear more casually.