What had John Mateer been working on this offseason when it comes to his throwing mechanics? “It’s really about his connection to the ground and the fluidity of the arm.” An inside look at his offseason training:

George Stoia@GeorgeStoia

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What had John Mateer been working on this offseason when it comes to his throwing mechanics? “It’s really about his connection to the ground and the fluidity of the arm.” An inside look at his offseason training:

on3.com

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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Jun 30, 2026, 2:25 PMView original on 𝕏 →