On 15 January 2002, the Chicago Fire acquired Korol and Miguel Saavedra from the Burn for the Fire's 2002 sixth-round draft pick. However, injuries to his left knee which resulted in bursitis led to his playing in only one game. When the Fire waived him, Korol signed with the Rochester Raging Rhinos on 26 July 2002. He appeared in two games with them before moving to the Indiana Blast for one game. In 2003, he moved to the Pittsburgh Riverhounds of USL-2. On 19 September 2003, the Kansas City Comets of Major Indoor Soccer League signed Korol to a one-year contract, with an option for one more. Korol played in nine games for the Comets as he was again hampered with injuries. The Comets waived him on 27 January 2004. On 12 February 2004, Korol signed with the Charleston Battery of USL-1. In June, the Battery released Korol and he signed with the Harrisburg City Islanders of USL-2 on 12 July 2004, in time for the playoffs.