The 1971 Topps football design was kind of quirky. The lower left corner featured a cartoon drawing of each player position. That made it a bit more difficult to remix the card for a baseball design.
Fortunately, I was able to find the two cartoon characters you see in the design below. I also helped that the characters were already wearing uniforms like the Reds.
It also took me a little while to find the font used for the team names. I’m using Rama Slab here, which isn’t a perfect match, but it’s pretty darn close.
As a side note…I would pay a lot of money to see the Reds use these uniforms in every game next season.