Posted By:
Daniel BrettaIMO there is no doubt that this is Joe Jackson in that photo.
When you consider that the guy standing to the right of Jackson is a dead ringer for Eddie Cicotte and the guy to his right is a dead ringer for Lefty Williams, and then you got a guy in the front row who is a dead ringer for Happy Felsch, and don't even mention the fact that the guy in the Army uniform is a dead ringer for Sam Crawford....well there's not much more you can say unless this Marks guy was running around the country with a bunch of impersonators.
edited to remove the Army reference because after further research I could not find a link between the Army and Crawford.