Prokop began his junior career with the Omaha Lancers of the United States Hockey League (USHL) during the 2018–19 season, where he recorded four assists in 25 games.

On November 14, 2019, he was traded to the Green Bay Gamblers in exchange for Dylan Wendt.

He became the first rookie defenseman in Union's NCAA Division I history to lead the team in points.

[6] During the 2023–24 season, in his sophomore year, he led the team in scoring with eight goals and 27 assists in 36 games.

[8] During conference play her led the team with six goals and 18 assists for 24 points, and was named a finalist for the ECAC Hockey Player of the Year.