Game used pitch chart cards... Zack Greinke

[AstroJake09]

Hi all,

Looking for a little info/help in regards to these pitch chart cards which according to the names and comparing them to rosters, come from the 2006 Wichita Wranglers. Many of the cards feature Zack Greinke as part of the staff and show his apperances throughout the season as well. This season was notable for Zack as towards the begining of spring training he took time off to take care of himself and his mental health, at the same time questioning whether he wanted to return to baseball at all. Therefore these cards feature not only his first Double-AA rehab starts but also workouts and pitching sessions as he worked his way back.
My question is who may have used these and what exactly was their purpose? Has anyone seen any other examples of these for other teams? Regardless, it is a fascinating look into the inner workings of the game and the pitching staff as well as a turbulent chapter of the Hall of Fame career of Greinke.

Thanks in advance!