Antwan Barnes fined $25,000

The NFL has fined San Diego Chargers linebacker Antwan Barnes $25,000 for bumping a referee Sunday in the Chargers' 38-26 win at Oakland.

Barnes was ejected from the game after he made contact with an official. A league spokesman said Friday that the specific reason for the fine was unnecessary physical contact with an official.

Barnes had a breakout season for the Chargers in 2011, finishing with 11 sacks.

Green Bay Packers linebacker Erik Walden was fined $15,000 by the NFL for roughing the passer.

Walden was penalized by the league on Friday for striking Detroit Lions quarterback Matthew Stafford in the head and neck area. He was whistled for a penalty in the third quarter of Green Bay's 45-41 victory last weekend.

Bill Williamson is ESPN.com's AFC West blogger. Information from The Associated Press was used in this report.