yep call them speckled cats or creek cats around here. biggest one I ever caught was in a seine seining for crawfish in a highway ditch weighed almost three lbs.
That's A bullhead alright. I catch them all the time. I usually get 1-2lb bullhead but they get up to 4 or 5 I believe. I don't know if that's a brown or a speckled bullhead though. My guess is brown