Boston Red Sox
Although they have not thrown an MLB pitch in 2023, Tanner Houck threw 2,561 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 (85mph), Sinker (95mph) and Fourseam Fastball (95mph), also mixing in a Splitter (88mph).
In 2022, compared to other RHP:
His slider sweeps across the zone and has some two-plane movement. His sinker generates an extremely high number of swings & misses compared to other pitchers' sinkers, has heavy sinking action, is a real worm killer that generates an extreme number of groundballs compared to other pitchers' sinkers, has well above average velo and has slight armside run. His fourseam fastball has heavy sinking action, results in somewhat more groundballs compared to other pitchers' fourseamers, has slight armside run and has slightly above average velo. His splitter is much firmer than usual, results in more flyballs compared to other pitchers' splitters, has some natural sink to it and has slight armside fade.