The 1914 E145 Cracker Jack set brought a jolt of red to the little prizes it had started inserting into boxes of their sticky confection two years earlier. More like thick paper than thin cardboard, the cards were susceptible to product staining and damage. Harry Lord at the bat is the subject of the SGC 1 example.  It's darkened a bit at the bottom of the obverse, with an upper right corner crease apparent.  The reverse has a bit of staining present.