For years, a major hobby dealer advertised in SCD buying all Doyle T206s. As there are several poses of Larry as well as Slow Joe, and one could argue Larry is a borderline HOFer, no one really thought all that much about it... I mean it was just a classified. I don't recall any reports of an attempt to alter it...and I am not sure he ever came across another Slow Joe NY Nat'l (he played for the AL club) or if he did it was just a couple out of hundreds of cards issued. It is probably a legit variation, but to be honest, doesn't seem all that interesting to me in the context of the great set.
Of course the assumption is that the company got Joe and Larry mixed up.
here's a link to some discussion.
http://www.t206museum.com/page/discussion_3.html