Cranking up the heat on y'all, here...this is Level THREE!
But I will help you out with some hints in advance:
1) Yes, these ARE from TOPPS baseball cards.
2) There are 4 different players here.
3) They are all oriented normally, with feet towards the ground.
4) None of the faces or the jersey names or numbers have been hidden.
5) Three of the players are extremely well known, and one is well-known as a player but not commonly recalled as a Halo.
6) None are current players.