Feel free to debate the hardest position in baseball. The truth is that they're all demanding in their own way, but catchers tend to take the most contact -- whether from opponents or their own pitcher.
Because catchers handle a lot behind the plate, they're more prone to injury than others. So, you may have noticed that a catcher tends to wear extra protection, including on their thumb. Do you know what that is on the thumb? JustBallGloves.com found out the answer.