Hymel played professionally from 1991 to 1997. He began his career with the Sumter Flyers, hitting .298 in 116 at-bats in 1991. in 1992, he played for the Albany Polecats, hitting .289 in 286 at-bats. He split the 1993 season with three teams - the West Palm Beach Expos, the AAA Ottawa Lynx and the Burlington Bees. He hit a combined .266 with 24 home runs and 51 RBI in 297 at-bats, he struck out 93 times but he walked only 10 times. He played the final two seasons of his career with the Harrisburg Senators and Ottawa Lynx. In 1994, he hit .249 with 12 home runs and only nine walks in 233 at-bats. In 1995, he hit .289 with 11 home runs in 302 at-bats. Overall, Hymel hit .320 with 63 home runs and 300 strikeouts in 1234 minor league at-bats. He walked only 77 times.