Also cut were defensive ends Tommie Hill and Alex Hall, defensive tackles Dwayne Hendricks and Nate Collins, cornerbacks Seth Williams and Courtney Brown, safeties John Busing, Matt O'Hanlon and Sha'reff Rashad, quarterback Dominic Randolph, running backs Gartrell Johnson and Andre Brown, fullback Jerome Johnson, receiver Tim Brown, tight end Scott Chandler, center Jim Cordle and offensive tackles Dennis Landolt, Jacob Bender and Herb Taylor.
Hall and Brown were waived injured. Hagan, Whimper and Busing had their contracts terminated.
The Giants open the regular season next Sunday in their new $1.6 billion stadium against the Carolina Panthers.
"We put the roster together in the best interest of our football team, the best way in which we felt would possibly balance off our numbers and still be very much aware the way in which you would rank the ability level of all the players on the team," coach Tom Coughlin said.
The Giants typically make a move or two in the week leading up to the opener, so the roster will probably be tweaked.
The defensive and offensive lines are the deepest spots on the team and Alford, who missed last season because of ACL surgery, and Whimper fell victim to the depth.
Bomar and Hagan probably lost their jobs when the Giants acquired veteran quarterback Sage Rosenfels and running back-special teams maven Darius Reynaud from the Vikings for a couple of future picks.
A second-year pro who has never played in an NFL regular-season game, Bomar played the entire second preseason game because of injuries to Manning and Jim Sorgi. It seemed he nailed down the backup job with a good performance on Thursday against New England, but the Giants eventually decided they wanted an experienced backup.
"Bomar's progress has been outstanding," Coughlin said. "He's worked very, very hard. He did receive a lot of attention, he did make progress and he did show us what he can do."
Pascoe was let go because the Giants decided to keep second-year tight end Travis Beckum, who missed most of training camp with a hamstring and neck injuries. For a week in camp, Pascoe was the only healthy tight end.
"There was an awful lot of sentiment for Bear, because of what he was able to do," Coughlin said.
The roster includes two free agent receivers — Victor Cruz, who grew up in nearby Paterson, and Duke Calhoun of Memphis, who caught a game-winning touchdown pass from Bomar in the preseason finale against New England.
A third-round draft pick in 2007, Alford was an up-and-coming linemen until his injury in a preseason game against Chicago last summer. His most memorable play as a Giant was a sack of Tom Brady on the final Patriots' series in the Super Bowl, helping nail down the title.
"It was competitive in that spot this year," Coughlin said. "Even though we still feel like we have a ways to go to have the front that we say we have, it was a very difficult choice to have to make."
Whimper, a fourth round pick in 2006, played in all 16 regular season games and four postseason games — mostly as a backup — in the 2007 season. He got a lot of playing time in the preseason but it wasn't enough to get him a job again.
The only other surprise was the release of Brown. The fourth-round draft pick missed his rookie season after tearing his Achilles' tendon in training camp. He looked good at times in camp this year but did not do a good job on kickoff returns.