In 1938, Krieger won five straight knockouts, starting with George Black, and Al Diamond in one round, Johnny Rossi in four, and then Stanley Hasrato in seven. In his knockout against Izzy Jannazzo, on April 6, 1938 at the Hippodrome, Krieger effectively used strong body blows to win the fight, but did not gain the eleventh-round TKO until his "wild punches" began to land. Janazzo had neither the reach nor the skills of Conn or Hostak who were both over four inches taller than Solly.