in Madison Square Garden on March 14, 1927. The New York papers were full of DiVodi...I knocked him out in the second round." The National Boxing Association recognized the bout as being for the World Super Lightweight title. Callahan defended his title again on May 31, 1927, against Spug Myers at Wrigley Field in Chicago and then on May 28, 1929, against Fred Mahan in Los Angeles. The NBA again recognized the ten-round points decision win over Myers as for the World Super Lightweight title. Callahan also fought a variety of non-title fights from 1927 to 1929. On July 13, 1927, Callahan lost a bout to Sergeant Sammy Baker by TKO in the ninth round. Baker had weighed in at , putting him four pounds over the junior welterweight limit, allowing Callahan to keep his title despite the loss. Four month later, on November 22, Callahan lost badly to Olympic champion Jackie Fields in a ten-round decision, although, again, he retained his title because Fields was overweight for the class. Of his March 28, 1928, ten-round win over Dick Hoppe at the Olympic Auditorium, the Montreal Gazette wrote, that he had won "in the opinion of ring siders seven of the ten rounds." Callahan had previously lost to Hoppe in ten rounds on November 10, 1927, in Hollywood Legion Stadium. Hoppe was not the quality of competition he would later face in Jackie Berg. On July 24, 1929, Callahan first fought British boxer Jack "Kid" Berg in a non-title fight. The ten-round unanimous decision in favor of Berg at Ebbets Field in Brooklyn, New York, did not bode well for Callahan's chances in a title match with Berg. On February 18, 1930, Callahan put his title on the line against "Kid" Berg at Royal Albert Hall in London, England. Berg knocked him out in the tenth round of the fifteen-round bout to take the title. Berg held it for the remainder of the year. There is some dispute as to whether the Light Welterweight title was actually on the line in this fight. The NBA had stripped Callahan of its version of the Light Welterweight title before the Berg fight. Furthermore, at the time of the Berg fight, Britain did not recognize the light welterweight division. The New York State Athletic Commission recognized the Berg–Callahan fight as being for the Light Welterweight title, however, and Berg won NBA recognition in