Arthur St. Leger "Texas" Mosse (March 29, 1872 – January 8, 1956) was an American football player and coach and the 9th head football coach of the Pittsburgh Panthers and the 13th head football coachfor the University of Kansas Jayhawks. While at Pittsburgh, he coached the university to its first undefeated season (10-0) in 1904. Mosse also played professional football for the Homestead Library & Athletic Club in 1901.