He was elected captain of the Penn State football team in 1917, however he enlisted in the US Army instead, serving as a lieutenant during World War I. He was again elected to captain the 1918 Penn State team, however after receiving his commission as a lieutenant his college career moved him to Columbia University, where he played end. During the war, he was stationed with the 79th Infantry Division in France. However, he still played football for the 79th Division and was selected for the All-AEF team. He rejoined Penn State in 1919.
Robb's whereabouts after 1928 are only speculative, but it is possible that he took up coaching outside of professional football. In 1962, he donated a wool Canton Bulldogs warm-up sideline jacket from the early 1920s to the Pro Football Hall of Fame. In 1963, Robb represented his former teammate, Wilbur Henry, as Henry was inducted into the Pro Football Hall of Fame.