Joseph Richard Brennan (1908–1949) was an Australian rugby league footballer who played in the 1930s.

Career Brennan was the elder brother of Len Brennan who also played for St. George and was a schoolboy GPS sprint champion. Brennan played with the Saints for four seasons from 1931 to 1934.The TRUTH (Sydney) Joe Brennan Photo 7/8/1932 https://trove.nla.gov.au/newspaper/article/169134092?searchTerm=%22joe%20brennan%22%20%22st.george%22&searchLimits=l-state=New+South+Wales|||l-decade=193

He played one season with Souths in 1936 before retiring from rugby league.Alan Whiticker/Glen Hudson: Encyclopedia of Rugby League Players, 1995.

Death Brennan died from accidental tetanus poisoning in Griffith, New South Wales on 23 June 1949.The Sun (Sydney) 'Tetanus Death" https://trove.nla.gov.au/newspaper/article/229775496?searchTerm=%22joseph%20brennan%22&searchLimits=l-state=New+South+Wales|||l-decade=194|||l-year=1949Sydney Morning Herald:Death Notice 24/6/1949 https://trove.nla.gov.au/newspaper/article/18120371?searchTerm=joseph%20richard%20brennan&searchLimits=l-state=New+South+Wales|||l-decade=194|||l-year=1949|||l-category=Family+Notices|||l-title=35

References