From Wikipedia, the free encyclopedia James Archibald McLarnin (19 December 1907 – 28 October 2004) was an Irish-Canadian professional boxer who became a two-time welterweight world champion and an International Boxing Hall of Fame inductee. McLarnin has been referred to as the greatest Irish boxer of all time. BoxRec ranks McLarnin as the 11th best pound-for-pound fighter of all-time, the second best Canadian boxer of all time after Sam Langford, and the third greatest welterweight of all time.