The Broncos elevated Katsis from the practice squad to the active roster Saturday ahead of Sunday's game against the Rams, Aric DiLalla of the Broncos' official site reports.
Katsis was likely elevated as a backup returner in case Marvin Mims (foot) is unable to suit up for Sunday's contest. The undrafted free agent out of Northern Arizona is set to suit up for his first NFL game but may be inactive if Mims is all set to play.