In his first professional season, he batted .329 as a third baseman for the High-A Peninsula White Sox. In both 1988 and 1989, he batted .259 and was sent as part of a conditional deal to the Texas Rangers. While in the Rangers organization, he played three seasons for Double-A Tulsa. Despite having reasonable success, he was released by the Rangers in 1992.
On February 23, 1992, Rohrmeier signed with the Kansas City Royals. Rohrmeier began playing for the Double-A Southern League's Memphis in 1992. Late in the 1994 season, while still playing for the Chicks under manager Ron Johnson, Rohrmeier was approaching Johnson's own single-season Southern League record for doubles. Rohrmeier was released on August 10 by the Royals because, according to the club, he had a physical and verbal altercation with Johnson stemming from his argument with an umpire. According to what The Cincinnati Post called "[o]thers in the Southern League," however, Rohrmeier was let go because he was closing in on Johnson's record.[2] After making some calls, Rohrmeier was offered a roster spot with the Cincinnati Reds' Southern League affiliate within 24 hours of his release.[3] He would end up setting a new Southern League single-season doubles record with 41.[2]
Playing in their minor leagues through 1995 and the Padres minor leagues in 1996, he signed with the Seattle Mariners on December 12, 1996. Rohrmeier had a career year in 1997 with Triple-A Tacoma. He batted .297 with 33 home runs and 120 RBI and earned a September promotion to the majors, going 3 for 9. In 1998, he again played for Triple-A Tacoma and again had a strong season, batting .286 with 25 home runs and 104 RBI.
In 1999, Rohrmeier signed with the Hanwha Eagles, a team in South Korea's KBO League. He and fellow American import Jay Davis, as well as Koreans Song Ji-man and Chang Jong-hoon, led the Eagles to the 1999 Korean Series championship; the team had a slugging percentage of .487, the highest team total in KBO League history.[4] Rohrmeier contributed with 45 home runs and 109 RBI to go with a slash line of .292/.388/.643.
He played two seasons for the Eagles, then one season for the LG Twins, before retiring after the 2001 season.