Power? I know his opponents and what not, but was he as manufactured as say, Billy Fox? Clark was a smallish fighter. 5'10 and he basically started his career as a LHW. His entire 48 fight career amazingly consisted of 92 rounds of fighting. So?
Clark is one guy where the stats do not matter. He was a grade C fighter, up agaisnt many fighters who had no business being in the ring. Based on what I have seen and read, Clark had some power, but I think a guy like Butterbean hit harder.