On the basis of this, Republic signed him to their standard Term Player Contract, running from May 25, 1936 to May 24, 1938. He was cast as one of the trio in the "Three Mesquiteers" series of westerns, starring in 24 of the 51 "3M" films made by the studio. He later left Republic in 1938 over a pay dispute. Over at Monogram Pictures, Corrigan began a new series of feature westerns, "The Range Busters", cheap knock-offs of The Three Mesquiteers, with a series character that used his name; between 1940 and 1943, he starred in 20 of the 24 films in this series.