Roger Maris spent two seasons with the Athletics in Kansas City, and this promotional card is from that 1958-59 period. Likely signed as part of a company promotion, the blank-back card is folded but the signature is 9/10. It measures 5.5x4", with one side boasting the signed card and other containing an advertisement. The vintage signature from this period on the card alone is valuable, and this PSA/DNA authenticated piece is folded but is otherwise in EX+ condition. Maris hit 35 homers in 221 games for KC; two years later he would crack 61 in one season with the Yankees.