Although they have not thrown an MLB pitch in 2023, Lucas Sims threw 3,538 pitches that were tracked by the PITCHf/x system between 2017 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 (94mph), also mixing in a Curve (79mph).
In 2022, compared to other RHP:
His slider sweeps across the zone and has some two-plane movement. His fourseam fastball is an extreme flyball pitch compared to other pitchers' fourseamers and has essentially average velo. His curve (take this with a grain of salt because he's only thrown 12 of them in 2022) is basically never swung at and missed compared to other pitchers' curves, results in somewhat more flyballs compared to other pitchers' curves and has slight glove-side movement.