Ian Rapoport of NFL Network reported James Thrash, the league's appeals officer, made the ruling Tuesday. Lynch received the ban for making contact with an official during the team's Week 7 clash with the Kansas City Chiefs.
The 31-year-old back, who came out of retirement to play for his hometown Raiders this season, ran off the sideline during a confrontation between several Oakland offensive linemen and Chiefs cornerback Marcus Peters, who'd delivered a questionable hit on quarterback Derek Carr.
Peters, a fellow Oakland native and longtime friend of Lynch, said after the game he wasn't surprised to see the Raiders star run onto the field to help him, though it led to his ejection.
"They can say what they want, but one thing's for certain: Family do come first," Peters told reporters.
Jay Glazer of Fox Sports noted Peters testified for Lynch during the appeal hearing.
The running back is slated to lose his $79,411 game check for Week 8 as well as a $31,250 roster bonus for missing Sunday's contest with the Bills, per Scott Bair of NBC Sports Bay Area.
Jalen Richard and DeAndre Washington figure to split most of the backfield workload against Buffalo. Fullback Jamize Olawale could also see some touches in short-yardage situations.
Lynch will be eligible to return when the Raiders travel to Hard Rock Stadium to face the Miami Dolphins in Week 9.
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