Keeping track of pitch calling, signs, and scouting reports is no easy task and sometimes guys need a little cheat sheet. Rutschman uses a wrist coach arm band from Nike to keep everything organized.
The band has multiple flip up pages that you can use to write down critical information. It looks like something a quarterback would wear, which makes sense because the catcher is the quarterback of the defense. Get your own at DicksSportingGoods.com for $22.