Linebacker Clint Sintim, the Giants' second-round draft pick in 2009 who has suffered major knee injuries each of the past two years, was waived from the physically unable to perform list.
He didn't participate in the team's offseason program and has been unable to pass a physical.
Sintim tore his right ACL on Dec. 13, 2010. He re-tore the ACL, along with the patella tendon, in the preseason finale last year.
Defensive end Justin Trattou was waived/injured as well. He suffered an ankle injury during the first week of training camp.
Meanwhile, defensive back/return specialist Laron Scott and defensive tackle Bobby Skinner were signed by the Giants.
Scott, an undrafted rookie out of Southern Georgia, originally signed with New Orleans in May, but was waived Aug. 6.
Skinner played at Montclair State and was also an undrafted rookie.