A lot has been made about John Mateer’s throwing motion, after his injury. “We all saw what it was,” Mateer said. This is a behind-the-scenes look into Mateer’s mechanics and how he’s improving them, including working with a biomechanics specialist:

George Stoia@GeorgeStoia

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A lot has been made about John Mateer’s throwing motion, after his injury. “We all saw what it was,” Mateer said. This is a behind-the-scenes look into Mateer’s mechanics and how he’s improving them, including working with a biomechanics specialist:

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Inside John Mateer's offseason, Part I: Learning how to throw with three titanium screws in his hand

On John Mateer's right hand, just beneath his thumb on the outside of his palm, you can see the scar from Dr. Steven Shin's incision marks.

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