What is the average weight for a Yellow Bullhead Catfish?

I caught one today on a live chub and i am wondering what is the average weight. I caught the fish but i did not have my scale with me to weigh it. It looked pretty hefty and it bent my rod pretty well when i was fighting it. So i am just wondering what is the average weight it looked and felt on the rod like a good 2lbs so maybe a little over average?