A former Golden Glove boxer in the late 1930's and early 40's, and the son of the late, great, trainer/manager, Earl Kaehn; Bill followed in his father's footsteps and became one of the more influential boxing figures in Minnesota from the 1950's through the present. He got his start as a trainer while assisting his father with the training duties of the great Del Flanagan, before re-emerging a few decades later and operating as the head of the University of Minnesota's boxing program and gym. He later trained and managed the careers of many local professional boxers including: Gary "The Hammer" Holmgren, Anthony "Untouchable" Stephens, "Dangerous" Danny Schommer, and more recently, Anthony "The Bullet" Bonsante. All of these fighters held or challenged for either state titles or world titles, and in some cases, both. One of the highlight's of Kaehn's career, was leading Anthony Bonsante in capturing the IBA World's Super Middleweight title in April of 2003. On an amateur note, Kaehn also holds the distinction of having coached the most Upper Midwest amateur champions in state history with various boxers producing a grand total of 37 titles, including the 1987 National Golden Gloves champion, Dave Sherbrooke, and he also coached Sherman Griffin to a victory over Evander Holyfield while both were amateurs. Kaehn retired at age 87 from training and management with the recent retirement of Anthony Bonsante.