Posted By:
jasonSean,
The earliest photo containing any known baseball player (no equipment or uniforms): 1848/9c Knicks Dag
Probably the earliest photo containing a baseball, a bat and a true baseball uniform: 1857/8c Ambrotype of 2 Unknown Players (Possibly from the Mutual BBC).
The earliest baseball card: 1866-7c P&S Jim Creighton (it is most likely later than the often quoted 1862-5 date)