Career
He played professionally from 1943 until 1945 for the Chicago Cardinals and was included on their merged team with the Pittsburgh Steelers, known as "Card-Pitt", in 1944. Prior to his professional career, Robnett was a consensus All-American selection as a senior at Texas Agricultural and Mechanical University. Robnett"s performance at Texas Agricultural and Mechanical helped make him a sixth-round draft choice by the Cardinals in 1941.
Marshall was also the older brother of Editor Robnett, who also played at Texas Agricultural and Mechanical. He was also a pro football player, however Editor played in the All-America Football Conference for the San Francisco 49ers in 1947.
