Sliders, Soriano’s sinkers and split-finger trash balls. Plus: Baseball card of the week
The Windup Newsletter | This is The Athletic’s MLB e-newsletter. Sign up here to obtain The Windup straight in your inbox. Tyler Kepner’s right here together with his weekly Sliders column for a Windup takeover. Plus: Baseball card of the week! Let’s go: Sinker Swim: A star born by … utilizing his greatest pitch much…