John Prokop is an American professional ice hockey defenceman for the Toronto Marlies of the American Hockey League while under contract to the Toronto Maple Leafs of the National Hockey League. He developed through the United States Hockey League and at Union College before beginning his professional career in 2025.
John Prokop Bio
John Prokop was born on May 13, 2001, in Wausau, Wisconsin, and is listed at 6 ft 3 in and 190 lb. A left-shooting defenseman, Prokop built a reputation for playmaking from the blue line during his collegiate career at Union College and earned multiple conference and national honors as a freshman and sophomore.
Early Life and Background
John Prokop grew up in Wausau, Wisconsin, where he began playing organized hockey and progressed through regional youth programs before entering junior hockey. His physical profile and left-handed shot helped him secure opportunities at the United States Hockey League level starting in the 2018–19 season.
Prokop moved into the USHL with the Omaha Lancers in 2018–19 and continued his development across several teams in the league. Those formative junior seasons prepared him for an NCAA opportunity and eventual commitment to Union College under coach Josh Hauge.
Path to Hockey
Prokop’s path followed a common route for American defensemen: strong performances in the USHL led to recruitment by NCAA programs. He played for the Omaha Lancers (2018–19), Muskegon Lumberjacks (2019), Green Bay Gamblers (2019–20), and Des Moines Buccaneers (2020–22), gaining experience against top junior competition.
While in the USHL Prokop was named to the 2019 USHL/NHL Top Prospects Game, an event that highlights players projected for higher-level opportunities. After those junior seasons he committed to Union College, joining a program that would allow him to showcase his offensive skill set from the defense position.
John Prokop Career
Early Career (2018–2022)
Prokop began his junior career in the USHL in 2018–19 with the Omaha Lancers, where he recorded four assists in 25 games. He split the 2019–20 season between the Muskegon Lumberjacks and the Green Bay Gamblers, contributing goals and assists during the campaign and appearing in the USHL/NHL Top Prospects Game.
From 2020 to 2022 Prokop played two seasons with the Des Moines Buccaneers, appearing in extended schedules and producing steady offensive numbers from the back end. During the 2020–21 season he recorded one goal and 11 assists in 46 games, and in 2021–22 he added one goal and 14 assists in 58 games, demonstrating consistent playmaking ability.
Union College Breakthrough (2022–2024)
Prokop committed to Union College after coach Josh Hauge, who had recruited him previously, was named head coach at Union prior to the 2022–23 season. In his freshman year he appeared in all 35 games and led the team in scoring with 23 points on four goals and 19 assists, becoming the first rookie defenseman in Union’s Division I history to lead the team in points.
That freshman performance earned Prokop selection to the All-ECAC Rookie Team and helped establish him as a leading offensive defenseman in conference play. In his sophomore season Prokop elevated his production further, leading Union with eight goals and 27 assists for 35 points in 36 games and serving as a central figure in the team’s attack.
During November of his sophomore year Prokop recorded one goal and nine assists in six games and registered multi-point games while recording at least one point in every game that month. That run resulted in his being named ECAC Hockey Defender of the Month for November 2023 and made him a finalist for the ECAC Hockey Player of the Year during conference play.
Toronto Marlies Era (2025–Present)
On March 20, 2025, John Prokop signed a one-year contract with the Toronto Maple Leafs, with the contract to begin in the 2025–26 season. Following the signing he was assigned to the Toronto Marlies, the Maple Leafs’ AHL affiliate, for the remainder of the 2024–25 season as he made the transition to professional hockey.
The move to the Marlies marked Prokop’s official start to his professional career in 2025 and placed him within the Maple Leafs organization as a prospect capable of contributing on the AHL blueline. His contract runs beginning in 2025 through 2026 under the terms announced when he signed.
Driving Style and Strengths
Prokop’s game is defined by offensive instincts and playmaking from the point, backed by his size and reach at 6 ft 3 in. He has shown an ability to quarterback the power play and provide a steady stream of assists while joining the rush, combining vision with a left-handed delivery that creates passing and shooting lanes.
Notable Events and Milestones
Key milestones in Prokop’s career include selection to the 2019 USHL/NHL Top Prospects Game, becoming the first rookie defenseman to lead Union College in scoring, earning All-ECAC Rookie Team honors, being named ECAC Hockey Defender of the Month for November 2023, and receiving unanimous All-ECAC First Team and AHCA East Second Team All-American recognition following his sophomore season.
John Prokop Career Wins
Prokop’s career highlights are reflected in conference and national honors and in leading roles at each level he played. While traditional win totals are team measures, Prokop’s individual achievements include leading Union College in scoring as a defenseman and earning multiple All-ECAC and All-American distinctions.
College Highlights
At Union College Prokop produced a breakout freshman season in 2022–23 with 23 points and followed that with a 35-point sophomore campaign in 2023–24, leading the team in scoring both years and becoming a finalist for ECAC Hockey Player of the Year during conference play. Those seasons yielded All-ECAC recognition and national honors.
Other Performances
In junior hockey Prokop’s steady contribution included multi-season play in the USHL with totals that reflected his developing playmaking ability, and his performance there earned an appearance at the USHL/NHL Top Prospects Game, an event that spotlights emerging talent for higher-level opportunities.
John Prokop Family
Family Background and Hockey Lineage
John Prokop was born in Wausau, Wisconsin, and his progression through regional youth hockey into the USHL and then the NCAA reflects a development pathway common to many American players. Specific family and parental details have not been disclosed in public records provided here.
Personal Life
Public information on Prokop’s personal life is limited to his birthplace and nationality. No spouse, partner, or children are listed in the public facts used for this profile.
2025 Season Performance
The 2025 season marked John Prokop’s entry into professional hockey after signing an NHL contract with the Toronto Maple Leafs and being assigned to the Toronto Marlies. That assignment allowed him to acclimate to the professional game with the Maple Leafs’ AHL affiliate during the remainder of the 2024–25 season ahead of his contract term beginning in 2025–26.
Prokop’s professional campaign in 2025 will be defined initially by his adaptation to AHL pacing and responsibilities on the Marlies’ blue line while remaining under contract to the Toronto Maple Leafs. His collegiate track record of playmaking from the blueline and his conference honors provide a basis for his role as an offensive defenseman in the early stages of his pro career.