Don't know if this will be of any help, but you never know!
Andrew Matthew O'Dea was born in December 1867 in Australia.He came to US in 1895.Was football or crew coach at Minnesota briefly, U. of Wisc. 1896-98, Harvard for one year, then Wisconsin again till 1906.Then he moved to Colorado to try sheep raising.Failed and moved to New York and worked for A.w. Spaulding Co.Died in 1936.His brother was Patrick O'Dea, who was a famous football player at Wisconsin in the 1896-97-98 years.
If this fella should turn out to be a relation, there are several people researching this family and we have more info.