Killings has decided to opt out of 2020 campaign, Paul Gutierrez of ESPN.com reports.
Killings was tendered a contract by the Raiders, Jerry McDonald of The San Jose Mercury News reports.
Killings sustained a torn pectoral muscle during the Raiders' first preseason tilt and will undergo surgery, which ultimately landed the cornerback on IR earlier this week as Michael Gehlken of the Dallas Morning News reports.
Killings was placed on injured reserve Sunday with an unspecified injury, Field Yates of ESPN reports.
Killings signed a contract with the Raiders on Thursday, Michael Gehlken of the Las Vegas Review-Journal reports.
Killings was cut by Indianapolis on Friday.
Killings (ankle) was waived from injured reserve Monday, Andrew Walker of the Colts' official site reports.
Killings (ankle) was placed on injured reserve by the Colts on Tuesday.
Killings (undisclosed) was waived off injured reserve with an injury settlement by the Eagles on Thursday, per the NFL's official transaction log.
Killings (undisclosed) reverted to injured reserve Sunday.