Zack Greinke's slider has been critical to his resurgence this season, but another tool in his arsenal caught some attention Monday night in Greinke's 12-strikeout performance for the Diamondbacks against the White Sox.
The super-slow curveball that Greinke threw to White Sox second-baseman Yolmer Sanchez accounted for the 12th and final strikeout of the night when Sanchez swung through the pitch before it arrived at the plate.
Baseball aficionados know the pitch as an Eephus- a term for an extra-slow junk ball that goes back to the 1930s when Pirates pitcher Rip Sewell popularized the pitch.