Arizona Diamondbacks
Although they have not thrown an MLB pitch in 2023, Kyle Nelson threw 905 pitches that were tracked by the PITCHf/x system between 2020 and 2022, including pitches thrown in the MLB Regular Season and Spring Training. In 2022, they relied primarily on their Slider (84mph) and Fourseam Fastball (92mph). He also rarely threw a Curve (77mph) and Change (86mph).
In 2022, compared to other LHP:
His slider has short glove-side cut and has some two-plane movement. His fourseam fastball has much less armside movement than typical, has some natural sinking action and has essentially average velo. His curve (take this with a grain of salt because he's only thrown 2 of them in 2022) is basically never swung at and missed compared to other pitchers' curves, has sweeping glove-side movement, is an extreme flyball pitch compared to other pitchers' curves and has little depth. His change (take this with a grain of salt because he's only thrown 1 of them in 2022) is basically never swung at and missed compared to other pitchers' changeups, is an extreme flyball pitch compared to other pitchers' changeups, is much firmer than usual, has slight cut action and has some natural sink to it.