I've been watching Cheers a lot and I've noticed a guy with dark hair in 4 or 5 episodes but he never has any lines. Does anyone know who he was?

Hm there are a lot of regulars who don't have any lines - people who just hang around the bar. Can you be more specific? What seasons are you talking about?

Is this your guy? His name is Alan

I seen him around seasons 3-6, no thats not him in the picture he's younger looking and has dark puffy hair. The one episode I remember he was in was "Never Love a Goalie".

I think you are thinking of Steve Giannelli as Steve. He fits your description.