Let’s take a look at Sem Robberse and Yosver Zulueta’s season so far.

Sem Robberse:

The Pitching Dutchman Sem Robberse is a 21-year-old righty pitching with the Double-A New Hampshire Fisher Cats. in 67.1 innings pitched, he has a 4.54 ERA and a 4.95 FIP. Moreover his 23.2 K% is up from 18.3% in Double-A last season, while his BB% is down from 9.6% to 9.2% this season.

While the ERA doesn’t sparkle by any means, Robberse is -3.5 years younger than the average pitcher in Double-A, and doesn’t look out of place.

He has a five pitch mix, a two-seam and a four-seam fastball, a slider, a curveball, and a changeup. He throws all pitches for strikes, and generates a decent amount of swing and miss. Robberse is a guy who has a high floor. Like Buck Martinez said, Robberse is just a pitcher.

Yosver Zulueta:

The 25-year-old flame-throwing righty was highly touted coming into the 2023 season, but has lost a bit of his luster as the season has worn on.

The Cuban has a 4.34 ERA and a 4.70 FIP in 37.1 innings pitched this season. While his 23.9 K% is solid, albeit much lower than 2022’s K%, his walk rate has remained an issue, as he has a 17.6 BB%.

In fact, Zulueta started the season in the rotation, but has been moved to the bullpen to pitch in a bulk role.

Furthermore, Zulueta attended last season’s Futures Game and picked up the win. He only threw one pitch that generated the inning-ending out, so this may be an attempt to make up for what happened last season.

Two very exciting prospects:

Although results haven’t exactly gone the way for either pitcher, both of them are intriguing prospects. Zulueta sits in the high-90s and has touched 100 mph, with a nasty slider and curveball and a good changeup.

Robberse’s numbers aren’t great on paper, but he’s holding his own in a league where he is significantly younger than the average pitcher. Furthermore, his stuff is good, and he has a real shot at filling the back-end of the rotation in a couple of seasons, and maybe even more!