Supplement

Figure 5

Slider’s four 3D geometries of five triplets of features:

Figure 12

Fastball’s two manifolds:

Figure 13

Manifolds of {“pfx_x”, “pfx_z”, “spin_dir”} with marked strips:

Figure 14

Manifolds of {‘’pfx_x’‘,’‘pfx_z’‘,’‘spin_dir’’} with marked strips: