On August 25, 2015, Zaleski was signed to the Toronto Argonauts's practice roster. He was promoted to the active roster on August 27 and re-added to the practice roster on September 3, 2015. He then moved back and forth between the practice roster and active roster several more times during the 2015 season. He played in four games for the Argonauts and caught one pass for six yards. He was released by the Argonauts on November 16, 2015.
