Check spent the rest of his career with the Ottawa "Senior" Senators of the QSHL, after having his contract re-purchased by the Canadiens and being loaned out. He competed in the Allan Cup twice more. In 1948 his team lost to the Edmonton Eskimos, but captured the championship in 1949 after facing off against the Regina Pats. In six seasons with the Senators, he scored a total of 81 goals and 84 assists, placing him among the top ten league scorers four times. He retired after the 1950–1951 season.