Something’s Gotten Into German Marquez
German Marquez is on quite the run. In the second half of the season, Marquez’s 2.3 WAR ranks third in all of baseball among pitchers behind only those marks recorded by Jacob deGrom and Patrick Corbin. His 2.29 FIP and 2.79 ERA since the All-Star break are both fantastic. He’s struck out nearly one-third of the batters he’s faced with five times as many strikeouts as walks. He’s doing all of this while pitching his home games in Colorado, and he’s just 23 years old. That’s quite the dramatic turnaround for a pitcher who put up a 4.73 FIP and a 5.53 ERA in his first 16 starts of the 2018 season. Like many young pitchers with a boatload of talent, Marquez has spent his first few years in the big leagues experimenting with different pitches and usage patterns. He seems to have found one that works.
A year ago, Marquez was primarily a fastball-curveball pitcher. He would mix in a change every now and again, and he did experiment with a slider, but it wasn’t used often and it stayed up in the zone. With a mid-90s fastball and good curve, Marquez produced a 21% strikeout rate, 7% walk rate, and an ERA and FIP in the mid-fours. In Coors Field, those still represented above-average numbers. For Marquez to progress, however, he was going to need to develop a third pitch. When Eric Longenhagen discussed Marquez ahead of the 2017 season, he anticipated the introduction of that third pitch.
Marquez also has a plus curveball in the 76-81 mph range that has a slurvy shape to it but bites hard and has solid depth. A back-foot curveball is the best weapon Marquez has against left-handed pitching right now, as his changeup is still below average. But Marquez is just 21 and his delivery is loose and fluid so there’s likely more coming from the changeup. Marquez’s command elicits similarly bullish projection because of the delivery and athleticism and he’s already throwing plenty of strikes. He’s a relatively low-risk mid-rotation arm, an above-average major-league starter.
Longenhagen mentioned the change as a potential addition, and Marquez did work to make that change more of a weapon heading into this season. That plan hasn’t exactly worked out. Marquez is throwing the changeup under 10% of the time this season. Even against lefties, he’s turned to it on just 11% of all occasions. What’s improved most for Marquez is the slider, and it is fooling hitters. Here’s Nick Hundley swinging at a slider despite holding a 2-1 advantage in the count:
The pitch works well in and out of the zone. When he throws the slider outside the zone, Marquez induces swings around 40% of the time, and batters swing and miss on two-thirds of those attempts. When the pitch is in the zone and batters swing, they make contact roughly 80% of the time, but on 44% of sliders in the zone, the hitter doesn’t bother to swing, like Evan Longoria in this 0-2 count.