Rader was promoted to the Steelers' active roster Saturday, Brooke Pryor of ESPN.com reports.
Rader is on track to make his NFL debut Sunday against the Browns with fellow tight end Eric Ebron moving to the reserve/COVID-19 list. Rader is a Youngstown State product who collected 22 receptions for 272 yards and a pair of scores during his final collegiate season in 2017.