The team, which would later be renamed the Pittsburgh Steelers in 1940, began the season with a new head coach, Luby DiMeolo.
Despite the change in leadership, the Pirates once again finished in 5th place in the NFL's Eastern Division.
However, McNally's time with the Pirates had little impact, and he returned to the Packers the following season.
These uniforms, which featured horizontal stripes, were mocked by opponents and fans alike, as the team was frequently compared to convicts.
While the modern-day Pittsburgh Steelers wore a throwback version of these uniforms from 2012 to 2016 (albeit with updated black and gold colors, leading to the "bumblebee" nickname), the original "jailbird" uniforms were only used during the 1934 season due to widespread ridicule.