Ravens left guard Kelechi Osemele was ruled out for Sunday's game against the Tampa Bay Buccaneers after testing his bruised, hyperextended right knee during warmups.
Osemele looked immobile while trying to do basic drills in the end zone. He was noticeably favoring his right leg and was unable to plant and change directions enough to convince the coaching staff and trainers to play him.
With Osemele out of the lineup, the Ravens will start backup center Gino Gradkowski at left guard. The Ravens also have rookie fifth-round pick John Urschel active for the first time this season.
The Ravens also have rookie wide receiver Michael Campanaro active for the first time, with Marlon Brown scratched due to a pelvic injury. The River Hill graduate worked with the regular offense this week in practice in addition to his regular scout team workload. Campanaro also is a punt returner and kick returner.
The Ravens also deactivated linebacker Arthur Brown, a 2013 second-round draft pick who hasn't played all season, and new tight end Ryan Taylor.
The Ravens previously ruled out offensive tackle Eugene Monroe, who's expected to miss a total of four to six games after undergoing arthroscopic knee surgery, rookie defensive tackle Timmy Jernigan, who's expected to miss at least a month with a meniscus injury, and defensive end Chris Canty, who's expected to miss two-to-three weeks after having wrist surgery last week, according to sources.
The Buccaneers scratched quarterback Josh McCown, cornerback Johnthan Banks, safety Dashon Goldson, linebacker Jonathan Casillas, defensive end Larry English, offensive tackle Kevin Pamphile and offensive guard Kadeem Edwards.
Wide receivers Vincent Jackson (ribs) and Mike Evans (groin) are both active for the Buccaneers. The Ravens will likely have Jimmy Smith match up with Jackson and have Lardarius Webb cover Evans. Jackson and Evans are both 6-feet-5, 230 pounds, comprising the biggest wide receiver starting tandem in the NFL.