Non-MLB
Roman Mendez has thrown 1,344 pitches that have been tracked by the PITCHf/x system between 2012 and 2025, including pitches thrown in the MLB Regular Season, Spring Training and Fall/Winter Ball. In 2025, they have relied primarily on their Fourseam Fastball (88mph) and Splitter (80mph), also mixing in a Slider (82mph).
In 2025, compared to other RHP:
Their fourseam fastball (take this with a grain of salt because they've only thrown 7 of them in 2025) comes in below hitting speed, has heavy sinking action, is basically never swung at and missed compared to other pitchers' fourseamers, is an extreme flyball pitch compared to other pitchers' fourseamers and has slight armside run. Their splitter (take this with a grain of salt because they've only thrown 4 of them in 2025) comes in below hitting speed, generates an extremely high number of swings & misses compared to other pitchers' splitters, is an extreme flyball pitch compared to other pitchers' splitters and has some natural sink to it. Their slider (take this with a grain of salt because they've only thrown 1 of them in 2025) is basically never swung at and missed compared to other pitchers' sliders, is an extreme flyball pitch compared to other pitchers' sliders, has less than expected depth and has primarily 12-6 movement.