I've located the photo of another missing manager, George Frazer, who managed the Syracuse Stars in 1890. There was a nice write up of him that appeared in the May 19, 1910 Syracuse Daily Journal. I've attached the photo and article.
The photo of Frazer also looks somewhat like the man in the suit labelled as Jack Chapman in the 1889 Syracuse Stars team photo linked below. Frazer was the owner of the Stars that year, so I think it may be him.
https://en.wikipedia.org/wiki/Jack_C...Stars_1889.JPG