Looney agreed to sign with the Giants on Saturday, Mike Garafolo of NFL Network reports.
Looney will be reuniting with Jason Garrett, who was his head coach during the majority of his tenure with Dallas. It was reported that Looney was close to signing with the Giants last year before he ultimately decided to stay with the Cowboys. The 2012 fourth-round pick is likely to compete with Brett Heggie for the backup role behind Nick Gates.