Oakland Raiders' Justin Ellis celebrates a sack of San Francisco 49ers' Colin Kaepernick in 4th quarter of Raiders' 24-13 win in NFL game at O.co Coliseum in Oakland, Calif., on Sunday, December 7, 2014.
Oakland Raiders' Justin Ellis celebrates a sack of San Francisco 49ers' Colin Kaepernick in 4th quarter of Raiders' 24-13 win in NFL game at O.co Coliseum in Oakland, Calif., on Sunday, December 7, 2014.
Photo: Scott Strazzante / The ChronicleThe Raiders activated nose tackle Justin Ellis from injured reserve Saturday, making him eligible to play Sunday against the AFC West-leading Kansas City Chiefs.