Since Miller Park has not become a PITCHf/x park yet, there isn't a lot of Sheets data - just three road games. But both Sheets and Zambrano had starts in Dodger Stadium within a few days in late May that we do have.
y0 was 55 ft. at that time, in Dodger Stadium, not the 50 that is in use at Wrigley and Chase Park I used in the Rich Hill and Micah Owings posts.
Now for the good stuff
Release and Speed
Both throw pretty hard, from different "release points" (55ft. from home)
When you break down speed a little more, things look different
Two things pop-out when we look at pfx_x and pfx_z. You start to get an idea that the positive z numbers have a lot of downward movement (the pfx_z values are gravity adjusted). And Sheets has a much tighter grouping - at least when velocity isn't considered.
Now we're starting to see things - different breaks, different velocity distributions.... I'll be back tomorrow with a look at tonight's (lousy) game and more on what they throw.
A better view of velocity