Editing Rosenborg BK (section)

=== Early years (1917–1959) ===

On 19 May 1917, 12 young men from ''Rosenborg'' in Trondheim founded '''Sportsklubben Odd'''. The name ''Odd'' was a tribute to [[Odd Grenland B.K.|Odd]] of [[Skien]], the most successful team in Norway at the time. Odd spent their first few years playing against other local teams before attempting to join the regional series in 1920. As with most of the "buddy" clubs formed at the time, they were repeatedly denied access. Since many of these players also played for the bigger teams, the authorities feared a possible shortage of players if too many small clubs were let in. As the years went by, disillusioned players began leaving the club, and in 1923 the first team played only a single match.

By 1926, management of the club had passed on to a new generation of members, and it was through their efforts that Odd were finally admitted into the regional series in 1927, ten years after the club was founded. A year later they were set for entry into the [[Football Association of Norway]], but their entry was blocked as the association refused to have two member clubs with the same name. The club therefore took on its current name, '''Rosenborg Ballklub''', on 26 October 1928. [[Rosenborg, Trondheim|Rosenborg]] is a mainly residential area in Trondheim.

Rosenborg enjoyed little success at first, moving constantly between the lower divisions of the regional series. Yet their performance was improving and in 1931 the team qualified for the highest level, and one year later they played in the [[Norwegian Football Cup|Norwegian Cup]] for the first time. It was also at this time that Rosenborg started planning for a new home ground at ''Lerkendal'', although this project was not completed until after World War II.