**`swing`**

- `[int64]` Whether or not the batter swung (`1`) or took (`0`).

**`pitch_name`**

- `[object]` The name of the pitch type to be thrown.

**`release_extension`**

- `[float64]` Release extension of pitch in feet as tracked by Statcast.

**`release_pos_x`**

- `[float64]` Horizontal release position of the ball measured in feet from the catcher's perspective.

**`release_pos_y`**

- `[float64]` Release position of pitch measured in feet from the catcher's perspective.

**`release_pos_z`**

- `[float64]` Vertical release position of the ball measured in feet from the catcher's perspective.

**`release_speed`**

- `[float64]` Velocity of the pitch thrown (miles per hour).

**`release_spin_rate`**

- `[float64]` Spin rate of pitch tracked by Statcast (revolutions per minute).

**`spin_axis`**

- `[float64]` The spin axis in the 2D X-Z plane in degrees from 0 to 360, such that 180 represents a pure backspin fastball and 0 degrees represents a pure topspin (12-6) curveball.

**`plate_x`**

- `[float64]` Horizontal position of the ball when it crosses home plate from the catcher's perspective (feet).

**`plate_z`**

- `[float64]` Vertical position of the ball when it crosses home plate from the catcher's perspective (feet).

**`pfx_x`**

- `[float64]` Horizontal movement in feet from the catcher's perspective.

**`pfx_z`**

- `[float64]` Vertical movement in feet from the catcher's perspective.

**`balls`**

- `[int64]` Pre-pitch number of balls in count.

**`strikes`**

- `[int64]` Pre-pitch number of strikes in count.

**`on_3b`**

- `[int64]` Indicator (`0` or `1`) for runner on 3rd base.

**`on_2b`**

- `[int64]` Indicator (`0` or `1`) for runner on 2nd base.

**`on_1b`**

- `[int64]` Indicator (`0` or `1`) for runner on 1st base.

**`outs_when_up`**

- `[int64]` Pre-pitch number of outs.

**`stand`**

- `[object]` Side of the plate batter is standing, either `L` (left) or `R` (right).

**`sz_top`**

- `[float64]` Top of the batter's strike zone set by the operator when the ball is halfway to the plate (feet).

**`sz_bot`**

- `[float64]` Bottom of the batter's strike zone set by the operator when the ball is halfway to the plate (feet).