When did Fitts change his wind up?

[GhostOfJackie]

I admittedly have not watched as much baseball this year. When did Trever Fitts change to that funny wind up?

 

[57stratdawg]

That waltz-step thing? A few weeks ago. It seems to have really helped him though.

 

[coach66]

It changes damn near every pitch*

Whatever works