Leo Senior (1887−1975) was an Australian rugby league footballer who played in the 1900s. He played four matches for South Sydney in the New South Wales Rugby League Premiership in his career and scored three tries in the same year.[2] He is most credited for scoring the first try in an NSWRL/NRL Grand Final in the inaugural NSWRL Final in 1908. His try strike rate was 0.75 (3 from 4 top grade appearances) one of the highest in the league's inaugural season. [3]