Mad Man fights Jack Dempsey, Bob Fitzsimmons and Jim Hall within 1 year

Vs Dempsey
Los Angeles daily herald., February 20, 1890, Page 3, Image 3
https://chroniclingamerica.loc.gov/...eq-3/#words=mccarthy+dempsey+Mccarthy+dempsey

Vs Bob Fitzsimmons
Los Angeles herald., May 30, 1890, Image 1
https://chroniclingamerica.loc.gov/...mons&y=16&x=5&dateFilterType=yearRange&page=1

Vs Jim Hall
Sportsman Wed 21 Jan 1891 Page 2
https://trove.nla.gov.au/newspaper/...|||l-year=1891|||l-state=Victoria|||l-month=1

What a mad man.