Rosas signed a reserve/future contract with the Giants on Thursday, Jordan Raanan of ESPN reports.
Rosas had a tryout with the Giants in November but didn't end up making the team. With the team's current kicker, Robbie Gould, set to be a free agent this offseason, Rosas will have a chance to be the Giants' starting kicker in 2017.
Norwood was signed to a reserve/future contract by the Giants, Dan Duggan of NJ.com reports.
Norwood has spent the past couple months as a member of the Giants' practice squad, and he'll have an opportunity to make the team's active roster throughout the upcoming offseason. After being drafted by the Seahawks in 2014, Norwood has recorded just nine receptions for 102 yards on 11 targets in regular season action since.
Overshadowed by his more famous linemates, Hankins is a solid run stuffer in his own right and managed three sacks as an interior lineman.
Collins had six solo tackles, three assists, a sack and two passes defensed Sunday against the Packers.
He finished the regular season with a whopping 100 solo tackles and 25 assists, four sacks and five interceptions and a touchdown, making him easily the top IDP defensive back and a centerpiece of the Giants defense for 2017.
Casillas had a solid season as the team's starting weak side linebacker with 96 total tackles (62 solo, 34 assists), 1.5 sacks and eight passes defensed.