Patriots outside linebacker Tully Banta-Cain underwent a surgical procedure on his abdomen on Friday, a source confirmed, while estimating a four-to-five week recovery period.
Banta-Cain sustained the injury last season and in meeting with team doctors at the end of the year, it was decided that no surgery was required.
However, Banta-Cain tweaked the injury in recent workouts, the source said.
Tully Banta-Cain Has Surgery