Martinez is dealing with wrist and hand injuries, according to the team website. He practiced fully all week before Saturday's designation.
The linebacker, who hasn't missed a game over the last two seasons, leads the NFL with 76 tackles.
Here are other news items we're monitoring on Saturday:
Defensive tackle Christian Wilkins has been fined $10,527 for throwing a punch in Week 7, per Rapoport. Wilkins was ejected for his actions.
- The Tennessee Titans on Saturday announced the promotion of WR Kalif Raymond and defensive back Kareem Orr to the active roster from the practice squad. Tennessee waived defensive linemanMatt Dickerson and RB Dalyn Dawkins.
- The Los Angeles Chargers announced left tackle Russell Okung (pulmonary embolism) has been activated for the first time this season. However, safety Nasir Adderely hamstring) has also been placed on injured reserve. The team announced both moves on Saturday.
- The Detroit Lions announced that LB Steve Longa has been promoted to the main roster from the practice squad. The team also announced it has released S Marcus Gilchrist.
- The Houston Texans have signed CB Cornell Armstrong to the active roster from the practice squad. In a corresponding move, the team waived CB Xavier Crawford from the active roster.