Question: do catchers pee on their hands?
Answer: "You pee on it,” Hill said at the time of trying to cure the blisters. ... Players believe that peeing on their hands can help toughen the skin. There's no definitive proof that that's true, but Slate's Dan Kois noted in 2004 that urea, a major component of urine, can be found in some commercial skin moisturizers.