Cheung Wai Yee Vivien saw 29 tracked pitches in 2018.
Against Fastballs (12 seen), they have a 40% whiff/swing. When they connected (1 tracked), they generated 51mph average exit velocity.
Against Breaking Pitches (17 seen), they have a 43% whiff/swing.
Against Offspeed Pitches (0 seen), they have a 0% whiff/swing.