Two Jays in Longenhagens daily prospect update:
Sem Robberse:
The most fun prospects are the ones heading in the right direction, with plenty to do between here and the big leagues. That describes Robberse, who was signed out of the Netherlands during the 2018 international signing period. At the time, it was a bet on athleticism: Robberse is a very agile and fluid athlete but his fastball peaked in the mid-80s as an amateur.
Fast forward a few years, and the Dutchman is now hitting the mid-90s and sitting 91-94 mph. As you’d expect based on the athleticism, he has a clean delivery, and he’s also shown impressive pitchability for a 19-year-old. For those who really like to dive deep, Robberse has made starts in Low-A Southeast, which has Trackman data from some of his outings. You can grind through that here, but the TLDR is that he has above average spin for his velo band and misses bats with both breaking pitches. It’s also worth mentioning that his pedestrian-looking walk rate was actually one of the top marks in his league, where the robots are handing out free passes by the dozen.
Robberse’s outing on Wednesday was a tale of two parts, which is not uncommon for pitchers his age. In the first three innings, he was the best version of himself: he got ahead consistently, moved his fastball to both sides of the plate, back-doored his two-plane slider, elevated for whiffs, and lured hitters out of the zone with his curve. The wheels came off in the fourth, though, as three frustrating errors and a series of hits seemed to put the teenager off of his game. By the end of his outing, he’d lost velocity, he was consistently missing armside with the fastball, and he had to be removed before the end of the frame.
Ultimately, there’s plenty to like here. He’s progressed through the Jays system at a blistering pace and, in bursts, he flashes a lot of starter traits. We’ll see if more consistency, and perhaps a bit more arm strength, comes with age.
Hayden Juenger:
Toronto’s sixth-round pick, Juenger is a three-pitch reliever. He works with a low-three quarters arm slot and it seemed like righties in particular were having trouble picking up the ball. In my look earlier this week, he consistently hit 94 mph throughout his two innings of work, and was particularly effective attacking the gloveside corner against righties. Not surprisingly given the slot, his slider is a predominantly horizontal sweeper, and the pitch is murder when he starts it on the plate and runs it away from right-handed hitters with a little late tilt. While he throws strikes, he’s prone to missing badly, and will need to button up that issue as he climbs Toronto’s ladder.