Swiss footballer
Rudolf Knup was a Swiss footballer who played in the 1940s as a forward.
Knup played his early football for Black Stars. He joined Basel's first team for their 1941–42 season as they played in the 1. Liga under player-manager Eugen Rupf. After one test match, Knup made his domestic league debut for the club in the home game at the Landhof on 31 August 1941 as Basel won 10–1 against SC Juventus Zürich. ;ref name="fcb-achiv-fcb juventus 1941/42" ; ;/ref ; He scored his first goal for his club on 12 October in the home game against Chiasso as Basel won 4–0. ;ref name="fcb-achiv-fcb-chiasso 1941/42" ; ;/ref ; Basel finished their season as winners of group East and qualified promotion play-offs against group West winners FC Bern. The 1st leg was the away tie, this ended with a goalless draw. Basel won the second leg at home 3–1 to achieve promotion. ;ref name="rsssf-Switzerland 1941/42" ; ;/ref ;
From 1941 to 1944 Knup played 19 games for Basel scoring that one goal; 14 of these games were in the 1. Liga or Nationalliga and five were friendly games. 
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Sources.
"(NB: Despite all efforts, the editors of these books and the authors in "Basler Fussballarchiv" have failed to be able to identify all the players, their date and place of birth or date and place of death, who played in the games during the early years of FC Basel)"