Youth and college Radwanski grew up in New Jersey and graduated from
Neptune High School in 1981. In 1999, he was named by
The Star-Ledger as one of the top ten New Jersey high school soccer players of the 1980s. In addition to playing with his school teams, he was a member of the Wall Atoms youth club. After graduating from high school, Radwanski attended the
University of North Carolina at Greensboro (UNCG) where he played on the school's
NCAA Division III soccer team from 1981 to 1984. In both 1982 and 1983, UNCG won the
Division III soccer championship. 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. 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 Professional 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. He spent three seasons with the Sidekicks, winning the 1986–1987 MISL title with them. Dallas released Radwanski on June 15, 1988. In October 1988,
Kenny Cooper Sr., head coach of the
Baltimore Blast, signed Radwanski to play with the Blast. However, Radwanski retired a few days later after being told during a team physical that he risked permanent back damage if he continued playing. Radwanski returned to soccer in 1990 when he joined the
Dallas Rockets of the
Southwest Independent Soccer League. In 1991, he was a member of the team when it won the league championship. In the fall of 1990, he signed with the
Tacoma Stars of MISL. He spent two season with the Stars until they folded at the end of the 1991–1992 season. In 1993, he moved east to the
Greensboro Dynamo of the USISL. He remained with the Dynamo until 1997. In 1996, the team renamed itself the
Carolina Dynamo. In both 1993 and 1994, the Dynamo won the USISL outdoor championship. In 1993, he was both the League and Championship MVPs. Radwanski returned to the indoor game in 1995 with the
Washington Warthogs of the
Continental Indoor Soccer League (CISL).
National team Radwanski earned five
caps with the
U.S. national team in 1985. His first cap came in a February 8, 1985 tie with
Switzerland. On May 26, 1985, he played in a
1986 FIFA World Cup qualification match, a 1–1 tie with
Costa Rica in Costa Rica. 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. His last cap came in a 5–0 loss to
England on June 16, 1985. In 1992, he earned one cap with the U.S. National Futsal Team. ==Coach==