him as "Mr. Clean" In the same article, Muehleisen described himself as "The White Knight", referring both to his demeanor and his court apparel. That nickname that stuck, and he is still sometimes known by it today. Somewhere in the 1968-1969 timeframe, Muehleisen shifted from paddleball to racquetball, and won the first national championship in 1969, at the age of 37, by narrowly defeating his protégé, Charlie Brumfield. Brumfield has explained that respect for Muehleisen ran so deep that when Muehleisen shifted sports, a large number of other players in Southern California (including Brumfield himself) also made the shift. Though racquetball was somewhat less gentle, Muehleisen extended etiquette to that sport as well, by establishing the official rules for the sport early on. His dedication to the sport brought him a devoted national following, and for many years, he had his own racquetball club (Muehleisen's Courts) in El Cajon, CA, with a dozen finely built concrete wall racquetball courts. He worked with contractors to build courts at other clubs throughout Southern California, and in the late 1970s there were dozens of clubs sporting "Muehleisen-style courts". That expression came to mean a four-walled racquetball court with smoothly plastered concrete walls, a varnished suspended maple floor, and an overhead viewing gallery. Players tend to favor this style of court as the ball bounces more true than with the hollow panel wall courts that are also common. Muehleisen's courts contributed to Southern California's prominence in early racquetball, and while most of those courts have been converted or destroyed over the years, a few still remain in daily use. When a Los Angeles area club re-purposed their Muehleisen-style courts in 2009, they brought Muehleisen back—78 years old at the time—to video tape him taking the last swing on the courts before they were converted for indoor rock climbing. "Dr. Bud" was instrumental in the establishment of Ektelon, the first major racquetball racket manufacturer (now a subsidiary of Prince Sports and still the leading manufacturer of rackets and accessories). The Ektelon web site reports that in: 1970 - Ektelon makes the first experimental racquetball racquet for Bud Muehleisen, a top competitor and one of the first legends of the sport. The Ektalon "Bud Muehleisen" model was a round-faced, silver anodized extruded aluminum racket that weighed in at 300 grams, almost twice the weight of a 2010 era racket. Muehleisen's relationship with Ektelon continued for many