In 1999, he was named by The Star-Ledger as one of the top ten New Jersey high school soccer players of the 1980s.

[1] In addition to playing with his school teams, he was a member of the Wall Atoms youth club.

In 1983 and 1984, Radwanski was named a first team Division III All American and finished his career at UNCG with thirty-eight goals and fifty-six assists.

[2] While he finished his collegiate playing career in 1984, he did not earn his UNCG bachelor's degree in business and economics until 1997, while playing for the Greensboro Dynamo In 1985, the expansion Dallas Sidekicks of Major Indoor Soccer League (MISL) made Radwanski the first player drafted by the team when they selected him with the number one pick in the 1985 MISL draft.

However, Radwanski retired a few days later after being told during a team physical that he risked permanent back damage if he continued playing.

However, he did not enter the return game in Torrance, California in which Costa Rica defeated the U.S. and knocked them out of contention for the finals.

That year, Radwanski coached the club to the best record in the W-2 before falling to the Hampton Roads Piranhas in the first round of the playoffs.

In 2011, Radwanski replaced Hershey Strosberg as coach of the Clemson Tigers women's soccer team.

[6] In 2016, Radwanski was named ACC Coach of the year after leading Clemson to a 13–3–3 regular season record.