(CBS) With growing concerns on defense, the Bears have signed veteran safety Derrick Martin to a one-year contract.

Martin, 5-foot-10 and 198 pounds, has played in 66 NFL games with four starts over seven season.

He’s spent time with the Ravens, Packers, Giants and Patriots. Martin has recorded 37 tackles, three interceptions, eight pass break-ups, one sack and one fumble recovery.

The 28-year-old Martin spent time with the Bears during this year’s preseason.