Guerrero only threw his changeup twice, but the pitch came in seven ticks below his fastball.
Guerrero’s calling card is his 99 mph average fastball velocity, touching triple digits on multiple occasions and good for Baseball Savant’s 100th percentile. Less auspicious, however, is the fireballer’s wobbly command: Guerrero finished 2019 with a higher walk rate (19.3%) than strikeout rate (18.2%) with his blistering four-seamer.
Guerrero’s slider was an extreme fly ball pitch, but unlike in 2018 when the pitch got a 45.5% IFFB%, 2019 managed just 6.7%.
Guerrero is a true flamethrower. With one of the hardest fastballs in the league, he has touched over 104 mph. It even gets quite a bit of extra run on occasion. Hitters still find a way to make contact about 80% of the time. This can be dangerous, as hard pitches can lead to hard exit velocity, contributing to his .386 BABIP against.
Guerrero is essentially a two-pitch pitcher with his slider as his second. However, he varies his slider velocity drastically, anywhere between 82 and 94 mph. It is his strikeout pitch getting batters to whiff at nearly a 20% rate with a 42% K rate.