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Brailyn Marquez, P
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Scouting report
There's very little to be gleaned from Marquez's horrendous big league debut except to say that the lack of mechanical consistency he displayed in that outing is the sort of thing I've seen from him pretty often on the backfields, and is a large part of why I have him projected as a single-inning reliever. Elite velocity carries Marquez's profile. His heater averaged 95.6 mph in 2019 and was parked at 97.8 in 2020, and there are only a half-dozen lefties on the planet who throw that hard. Marquez walked 13% of Low-A hitters over 17 starts in 2019 but was promoted to Hi-A anyway because he was just bullying hitters with heat and not really refining anything else. The Cubs have tried to get his lower- and upper-halves to synch better in the hopes that it will help him pepper the zone more consistently, and there have been fits and starts where it looks like things have clicked only to regress, similar to the way Phillipe Aumont's consistency did during his prospect peak. Marquez's changeup has bat-missing action and his arm slot makes his slider tough on lefties, though it's not a good pitch in a vacuum and both of his secondary offerings are typically dependent on location. There really aren't big league starters with this kind of build (especially at this age) and lack of athleticism, but there also aren't many pitchers who throw this hard. Still just 22, I expect Marquez will eventually find a consistent second pitch and work in a high-leverage relief role. (Alternate site, MLB)