Alexander, a nine-year NFL veteran, has 154 tackles (95 solo), nine sacks, three forced fumbles, three fumble recoveries and six passes defended in his career.
The Berkeley, Calif. native has also been a standout on special teams, as he has recorded 94 special teams tackles throughout his time in the NFL.
Alexander, 32, was signed as an undrafted free agent by the Panthers in 2005.
To make room for Alexander on their roster, the Raiders waived linebacker Horace Miller.
- Kayla Lombardo