In his rookie season, Hall led the league in passing, was second in passing yardage, and fifth in rushing yards. He was named the league's most valuable player in 1939 and was the first professional player to complete over 100 passes in a single season.
On October 20, 1940, in a game against the Chicago Cardinals, Hall set an NFL record with 46 yards per completion. Hall completed 3/17 passes for 138 yards, two touchdowns, and two interceptions.[2][3]
He spent four seasons with the Rams, and after returning from military service during World War II, Hall played with the 49ers of the All-America Football Conference (AAFC) during their inaugural season.
He moved to Memphis, Tennessee, after retiring from football and worked in the lumber business.