The evolution of a million-dollar arm can be halted by any number of injury risks. Throwing too hard, throwing too many pitches, throwing all year round and throwing too many breaking balls have all been linked to the endemic fraying of elbow ligaments and shoulder tendons. Now, youth pitchers can add to that list one of their favorite off-the-field hobbies.

Source: Wall Street Journal August 24, 2018 12:07 UTC