At Florida State, he became the NCAA Men's Gymnastics All-Round Champion,[5] and led his school to win the team event.[1] Later the same year, Roetzheim travelled to the 1951 Pan American Games in Buenos Aires at his own expense.[1] At the games, he won two gold medals, in the individual all-around and horizontal bar,[6][7] along with two silver medals, in the floor and pommel horse.[8][9] During the 1940s and 1950s, Roetzheim went on to win seven AUU titles.[1]
From 1955 to 1968, Roetzheim coached high school gymnastics in Illinois.[14] He had 3 Illinois team championships and a further 19 individual state champions.[14][15]
In 1968, Roetzheim became the gymnastics coach at the University of Illinois at Chicago Circle, a post he held until 1973.[12] He compiled a record of 82–25 with the team and the following year, he became the athletic director at the University.[16] He oversaw the transition of the school's athletic program to NCAA Division I status in 1981 before leaving the role in 1985.[16]
He was also a judge at four consecutive Summer Olympics from 1984 to 1996.[4][12]
Roetzheim was inducted into the US Gymnastics Hall of Fame in 1975,[4] the UIC Athletics Hall of Fame in 1990,[16] the National Gymnastics Judges Association Hall of Fame and the Illinois High School Hall of Fame.[17]