Hassenauer (triceps) was placed on injured reserve Tuesday,Dan Salomone of the Giants' official site reports.
Hassenauer suffered a torn triceps during practice Sunday, an injury which will require surgery, Mike Moraitis of GiantsWire reports.
Hassenauer signed his exclusive rights free agent tender with the Steelers on Tuesday, Dale Lolley of DKPittsburghSports.com reports.
Hassenauer (pectoral) was activated from IR on Saturday, Teresa Varley of the Steelers' official site reports.
The Steelers designated Hassenauer (pectoral) to return from injured reserve Wednesday, Dale Lolley of DKPittsburghSports.com reports.
Hassenauer (pectoral) was placed on injured reserve Saturday, Brooke Pryor of ESPN.com reports.
Hassenauer (pectoral) has been ruled out for Sunday's game against the Bengals, Brooke Pryor of ESPN.com reports.
Hassenauer won't return to Sunday's game against the Chargers due to a shoulder injury.
Hassenauer (knee) was in full pads during Saturday's practice, Dale Lolley of DKPittsburghSports.com reports.
Hassenauer is being considered day-to-day after suffering a knee injury during practice, Brooke Pryor of ESPN.com reports.