Marcus Cannon's activation means another departure for Ross Ventrone.
The Patriots announced the activation of Cannon, a guard chosen in the fifth round of the 2001 draft out of Texas Christian University, to the 53-man roster from the reserve/non-football injury list.
Ventrone, who has been shuttled between the active roster, the practice squad, and NFL unemployment multiple times this season, was released. Defensive back Malcolm Williams was added to the practice squad.
This is the 11th time Ventrone has been involved in a transaction since Sept. 3.
Today was the deadline for the Patriots to make a decision about Cannon, a 6-foot-5-inch, 358-pounder who didn't allow a sack in his final two seasons at TCU. He was diagnosed with non-Hodgkin's lymphoma earlier this year. He was given a series of treatments and was cleared to return to football months later.
Ventrone, a defensive back and special teams player, has seen action in five games for the Patriots this season, including Sunday night's win over the Jets.