Guess what I found in my box of Rizzo's! A 1980 style 3-D Jake Arrieta.
In the Chicagoland area you can still find boxes of Anthony Rizzo's Cereal at the local Jewel grocery store. Unfortunately, they don't really have "Free Retro Baseball Cards". But they are packed with 8 essential vitamins and minerals plus the box is a "Collector's Edition".
On the 6th, The A's played host to the Cubbies for a 1980's throwback game. The Cubs wore their light blue pinstripes. I found this card of Hall of Famer Bruce Sutter. Too bad it is a pre-bearded Sutter. It would have been nice to draw a comparison between the uniforms and the beards.