Walker, 25, led the Roughnecks to a 5-0 record before the XFL season was halted due to the Coronavirus outbreak. He led the league in passing yards with 1,338, while completing 65 percent of his passes. His 15 touchdowns passes also led the XFL.
After going undrafted out of Temple, Walker spent 2017 and 2018 on the Indianapolis Colts practice squad.