Tyson Williams, the 4-year-old son of Raiders defensive line coach Terrell Williams, died Friday night at Oakland Children's Hospital from a "sudden and unexpected illness," according to a team release.

"We were all shocked by the news we received when we arrived in Baltimore," Raiders coach Dennis Allen said in a statement. "Terrell and Tifini have been dealing with unimaginable tragedy this week and our hearts go out to them. We're all deeply saddened by the passing of Tyson, and our deepest sympathies go out to Terrell and his entire family."

In addition to his parents, Tyson is survived by an 8-month-old brother, Tahj.

Allen said the defensive staff would share the workload in Terrell Williams' indefinite absence.

The team requests that condolences be sent to Williams at team headquarters at 1220 Harbor Bay Parkway, Alameda, CA 94502.

Steelers: Wide receiver Emmanuel Sanders said he will appeal the $15,000 fine levied against him by the NFL on Friday. Sanders was fined for faking an injury during a game last month.

The NFL also fined the organization $35,000 over Sanders' sudden -- and quickly healed -- leg injury in the fourth quarter of a 24-17 victory against Cincinnati on Oct. 21.

Sanders fell to the ground unexpectedly as the Steelers were preparing to huddle. He was tended to by team doctors and spent one play on the sideline before returning.

Sanders is expected to start Monday when Pittsburgh plays host to Kansas City.

He will replace Antonio Brown, who will miss the game because of an ankle injury.

Safety Troy Polamalu (right calf), tackle Marcus Gilbert (ankle) and linebacker Stevenson Sylvester (hamstring) are also out against the Chiefs.

Running back Rashard Mendenhall is questionable while battling a strained right Achilles.

Giants: Cornerback Will Hill was activated, and cornerback Michael Coe (hamstring) was placed on injured reserve.

Hill returned to practice last week after serving a four-game suspension for violating the NFL's policy on performance-enhancing substances.

The Associated Press contributed to this report.