Starting in 1948, the league championship game was called "The Soup Bowl", as the Capuchin Soup kitchen became the benefactor of some of the proceeds from the game. The Soup Bowl game was always played at University of Detroit Stadium. After the affiliation with the Capuchins ended in 1967 the game was called the "Charity Bowl" and since 1971 the "Prep Bowl". The Prep Bowl was played at the Pontiac Silverdome and, since 2002, at Ford Field. The Prep Bowl today also involves the Detroit Catholic Youth Organization (CYO) for Catholic elementary schools as well as games within the high school divisions of the CHSL. Prep Bowl facts: Through 2015, the winningest high schools in Prep Bowl history, regardless of divisions, are: Bloomfield Hills Brother Rice (twenty-three A-B Division, Central-AA Division and Wildcard wins) Detroit Catholic Central (twenty A-B Division, Central-AA Division and Wildcard wins) Waterford Our Lady of the Lakes (fourteen C-D Division and Wildcard wins) For all Prep Bowl high school football game results, click here Soup Bowl Fact: St. Mary of Redford won the most Soup Bowl games (7) followed by Grosse Pointe St. Ambrose (5). Parochial League Football Championship Facts: From 1926 to 1947, Detroit Catholic Central won the most league football championships (6) followed by Detroit Holy Redeemer (4) and Detroit St. Theresa of Avila (4). Operation Friendship In 1947, the Detroit City League boys basketball champion and the Detroit Parochial League boys basketball champion met at Olympia Stadium in Detroit to play for the first time to determine who would wear the crown as the Detroit City Basketball Champions. The game between Detroit Miller High School and Detroit St. Joseph High School drew so much interest it sold out Olympia Stadium, with a capacity of 11,563 and in so doing established a state record for attendance at a high school basketball game. This was the first of what would, in later years, become known as the Operation Friendship Championship pitting the best of the Detroit Public School League against the Catholic High School League. At the end of the evening, the Detroit Miller Trojans defeated the Detroit St. Joseph Blue Jays 47-34 to claim the first ever Detroit City Basketball High School Championship. Since that game, the Detroit Public School League champions and the Detroit Catholic High School League champions have met nearly every year to determine the Detroit City Champions. In later years,