Bennett played only seven games with the Packers after winning a Super Bowl in New England past year; the Bears traded him to the Packers in March 2016.
On Wednesday, the Packers cut Bennett, a former Texas A&M star, with a failure to disclose a medical condition designation. By the afternoon, Bennett had been cut by the Packers.
The veteran tight end made waves last week when he indicated through his Instagram account that he was likely to retire after the 2017 season. The Packers may look to add more depth at the tight end position in the near future, quite possibly from practice squad member Emmanuel Byrd.
Releasing the 30-year-old Bennett under that umbrella makes the Packers eligible to reclaim $4.2 million from his signing bonus, according to ESPN.More news: Lin-Manuel Miranda to return to 'Hamilton' role in Puerto Rico
Martellus Bennett is the latest Green Bay player to be ruled out for Week 10. Without Bennett on Monday night against the Lions, Kendricks had two catches for 32 yards and Rodgers one catch for 5 yards.
"The 6'6" TE struggled to adjust to the offensive scheme in Green Bay, as in seven games he only recorded 24 receptions for 233 yards and no touchdowns, and developed an issue with drops that he never seemed to recover from.
Bennett was the Packers' biggest free-agent signing during the National Football League offseason.
Meanwhile, Bennett will hit waivers, where another team can claim him if it so chooses.
"The other guys have proven they can do it as well", tight ends coach Brian Angelichio said last week when asked about not having Bennett.