On January 21, 2026, Jett Williams and Brandon Sproat were traded to the Milwaukee Brewers. This list, and their place on it, was compiled back in late-November. For continuity’s sake, I decided upon including Williams and Sproat’s profile, but for all intents and purposes, every player on our list below the pair can be considered to have moved up, with the addition of prospects 26 and 27 effectively becoming 24 and 25.
Hartland, Wisconsin native Peter Kussow attended Arrowhead High School in Hartland, Wisconsin, a school that up until this point has never produced a major leaguer; infielder Scott Doffek, who was signed by the Los Angeles Dodgers in the late-80s and made it as high as Double-A is the closest the school has to offer. Initially a two-sport baseball and football player, he gave up the gridiron to focus on baseball, and in doing so, changed the trajectory of his life for the better. In 2025, his senior year, the 20-6 Arrowhead Warhawks were rated 10 among Division 1 schools by the Wisconsin Baseball Coaches Association, and Peter Kussow was a big reason why. After growing, putting on some weight, and experiencing a fastball velocity boost, the right-hander posted a 2.03 ERA in 33.1 innings, allowing 22 hits, walking 14, and striking out a team-leading 75 batters, nearly 33% of the entire team’s total. Unsurprisingly as a result, scouts and evaluators considered the big right-hander one of the best draft-eligible high school players in Wisconsin in 2025, and arguably the best pitcher.
Overview
Name: Peter Kussow
Position: RHP
Born: 12/08/2006 (Age 19 season in 2026)
Height: 6’5”
Weight: 205 lbs.
Bats/Throws: R/R
Acquired: 2025 MLB Draft, 4th Round (Arrowhead Union High School, Wisconsin)
2025 Stats: DNP
The Mets selected Kussow with their 4th round pick in the 2025 MLB Draft, the only prep player in the entire state to be selected in 2025. The right-hander had a commitment to play baseball for the University of Louisville but ended up forging it as he signed professionally to play for the Mets. With an MLB-assigned slot value for the 133rd overall pick of $555,800, Kussow and the Mets agreed to an $897,500 signing bonus, $341,700 above slot value. He did not pitch in 2025.
Kussow, who stands 6’5” and is listed at 205-pounds, throws from a high-three-quarters arm slot with a long arm action through the back and wrist hyperflexion. His whippy arm is capable of reaching 97 MPH, though the pitch generally lives in the low-90s. The pitch generally sits around 2400 RPM, generating as much as 18 inches of induced vertical break. In addition to the ride, thanks to his arm slot and his crossfire delivery, the pitch has plenty of arm-side run, and when thrown down in the zone, has steep angle thanks to his height and extension.
His slider is his go-to strikeout pitch, though he also likes to throw it for strikes early in the count as well. The pitch sits in the high-80s and features gyroscopic movement, averaging roughly 2500 RPM of spin, topping out almost 2700 RPM. The pitch possesses late vertical slice without much horizontal movement and the right-hander has consistently been able to command the pitch all throughout his high school career. Kussow rounds out his pitching repertoire with a changeup, which sits in the high-80s and at present is still developing as a pitch but shows promise thanks to the tumble and fade it gets.
The right-hander has displayed inconsistent command of his pitches, partially because of his mechanics and partially because, as a pitcher from a cold weather state, he does not have as much mound experience as many of his peers. Additionally, while he has not displayed them over the course of his high school career, he may eventually develop platoon splits against better competition because of his mechanics. Because of the extremely long arm circle through the back that he utilizes, left-handed hitters have plenty of time to pick up the ball in his hand.
2026 Mets Top 25 Prospect List
1) Nolan McLean
2) Carson Benge
3) Jonah Tong
4) Jett Williams*
5) Brandon Sproat*
6) A.J. Ewing
7) Jacob Reimer
8) Ryan Clifford
9) Will Watson
10) Jack Wenninger
11) Mitch Voit
12) Jonathan Santucci
13) Elian Peña
14) Zach Thornton
15) Nick Morabito
16) R.J. Gordon
17) Chris Suero
18) Dylan Ross
19) Ryan Lambert
20) Antonio Jimenez
21) Edward Lantigua
22) Eli Serrano III
23) Randy Guzman
24) Daiverson Gutierrez
25) Boston Baro
26) Marco Vargas
27) Peter Kussow