It was widely reported that Mike McCallum suffered the first knockdown of his pro career in his loss to Fabrice Tiozzo, in fact I've even added it as a comment.
While browsing through some old magazines I came across a fight report of the McCallum v. Herol Graham match, and apparently McCallum was down in that fight as well ( though the knockdown looked very much like a slip according to the reporter, McCallum was given an 8-count ). Can anyone who has seen the fight confirm this?