Question for the baseball board

[LikeNebraska]

Watching the tape delay of Huskers - Baylor game tonight. Altavilla is at the plate taking signs from the dugout. He pulls a "cheat sheet" from his back pocket to decode the signs. WTF? Is this common nowadays?....First time I've seen a player need a play card at the plate.

 

[k9_r]

Saw that Hagge wears one on his wrist. Was surprised at that too.

 

[gunNrun]

Doesn't Michigan wear theirs as a belt buckle?

Remembering some team complaining about it because they were very reflective.