UK, I agree with you that the player at the far left of the four you present is Bill Tobin, not Buttercup Dickerson. I believe that your photo of Dickerson at the far right came from the team photo of the 1883 Pittsburgh Alleghanys. One version of that photo appears on p. 49 of THE BEER AND WHISKY LEAGUE,
by David Nemec.
Buttercup also appeared in a Troy uniform. Attached below on the left is a photo of the 1800 Troy team. Please excuse the quality, but I don't have anything better showing the entire team.
Top row (L to R): Bill Tobin, Tim Keefe, Ed Cogswell, Ed Caskin
Middle row (L to R): John Cassidy, William Holbert, Robert Ferguson (Mgr.), Pat Gillespie, Mickey Welch
Bottom row (L to R): Buttercup Dickerson, Jake Evans
A clearer view of Buttercup Dickerson from the same team photo is shown on the right. This view came from the website
TheDeadballEra.com :: THE DEADBALL ERA: INDEX
Buttercup looks very different in the two photos from 1880 and 1883. Could there be a misidentification? Certainly. Errors have been found previously among the photos in THE BEER AND WHISKY LEAGUE and I don't know how reliable the original ID's for the Troy team photos were. But these are the only two Dickerson photos with which I'm familiar.