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).