We can assume Drago is talking about the photo of Carl Weathers' Apollo Creed, which is in sharp focus. But right beside Apollo is a photo of Houdini! Even out of focus you can see this is the well-known photo of Houdini being playfully restrained by lightweight champion Benny Leonard while heavyweight champ Jack Dempsey winds back for a punch. (Another photo taken at this time shows Houdini refereeing a "bout" between Leonard and Dempsey.) I'm still not sure what this photo is all about nor when it was taken (I've seen 1920), but it's likely this was some kind of a war benefit as we see armed doughboys watching the antics.
Of course, Houdini was a boxer in his youth, so you might say there are three famous boxers in this photo! Worthy of Rocky's wall of fame.
Click the related links below for more hidden Houdinis.
UPDATE: It appears this photo is related to the 1920 New York City Police Field Day Games held on August 21 & 29. Houdini, Dempsey, and Leonard were all present at the event (Houdini did a suspended straitjacket). I also think the men may have served on the games "Athletic Committee", and that is what we are seeing in the photo below. There is still some discrepancy as to the exact day the photos were taken. It's possible they were taken before the games to help promote the event.