Sims is 9-1 in his professional boxing career, with five knockouts in his nine wins. Armstrong had his first world title fight at the age of 24 on October 29, 1937 after 93 professional fights, against Petey Sarron for the featherweight NBA and The Ring titles. Therefore, its best to use Encyclopedia.com citations as a starting point before checking the style against your school or publications requirements and the most-recent information available at these sites: http://www.chicagomanualofstyle.org/tools_citationguide.html. He made $35 for his pro debut, and was knocked out in three rounds.