By 1940, Lawrence's teams were undefeated in 38 consecutive games, won three consecutive state titles and retired the trophy presented by the "Evening Sun" for the winner of the City-Poly game. In 1941, an undefeated City College went to Florida, to play Miami High School in the Orange Bowl stadium. The Knights, used to playing in cool autumnal or cold winter weather, lost to Miami High with the temperature exceeding 90 °F. After the season, Lawrence and his long-time assistant, Otts Helms joined the war effort; Helms was a captain in the Army and Lawrence served as a lieutenant in the Navy for the remainder of World War II. In 1947, Lawrence became the head coach at Bucknell University where future City College head football coach, George Young, played for him in the early 1950s.