Olszewski re-signed with the Giants on a one-year contract Monday, Jordan Raanan of ESPN.com reports.
Olszewski finished the season with one reception on one target for zero yards over 12 games between the Giants and Steelers. He added 24 kick-return yards and 281 yards, along with a touchdown, as a punt returner.
Olszewski logged all nine of his snaps on special teams in Monday's 24-22 win over the Packers.
Olszewski re-signed with the Giants' practice squad Tuesday, Aaron Wilson of KPRC 2 Houston reports.
The Giants released Olszewski on Monday, Field Yates of ESPN reports.
The Giants signed Olszewski to their active roster Saturday, Dan Duggan of The Athletic reports.
The Giants signed Olszewski to their practice squad Monday, Tom Pelissero of NFL Network reports.
The Steelers officially released Olszewski on Saturday, Teresa Varley of the team's official website reports.
The Steelers plan to release Olszewski, Brooke Pryor of ESPN.com reports.
Olszewski is active ahead of Sunday's game against the Ravens, Teresa Varley of the Steelers' official site reports.