I can see the Mountain comparison but to me he sounds like what Robin Trower would sound like if he came out of San Francisco instead of England. Is he just the vocalist or is he the guitarist as well? If he was just the vocalist this might have had more success had it been credited to The whoever the guitarist is Band than to him. Vocals are kind of a shrill 2nd rate Robert Plant quality (maybe 3rd rate if you consider David Coverdale to be 2nd rate). Guitar riff is very early 1970s heavy though.

According to Wikipedia he wrote Forever Man and Pretending for Clapton and had also written songs for Robert Plant, Bonnie Raitt, B.B. King and both Vaughan brothers. His biggest success however came from Delbert McLinton's cover of Giving It Up For Your Love.