However, the win won't be remembered for their play - it'll be remembered for Seahwaks defensive end Quinton Jefferson trying to get into the stands to confront Jacksonville fans.
Jefferson was jogging toward the tunnel that leads to the visiting locker room at EverBank Field when video footage showed something fly just over his head.
As Jefferson continued to jaw with the fans, objects were thrown at him for a second time, causing him to get really upset.
Jefferson was one of three Seahawks to be ejected late in the match as frustrations boiled over. His punishment might not have been so severe if officials weren't concerned about reining in tempers, following a melee on the previous play.
Chiefs stay on top of AFC West with win over Raiders
Cooper crushed the Chiefs in the Raiders' 31-30 victory earlier this season with 11 receptions for 210 yards and two touchdowns. Despite losing six of their past seven games, the Chiefs have a superior coaching staff to Oakland.
Seattle defensive end Michael Bennett ignited the fiasco when he rolled onto the leg of Jaguars offensive lineman Brandon Linder.
It was a balanced effort against the Seahawks with Blake Bortles throwing a pair of touchdowns while rookie running back Leonard Fournette ran for more than 100 rushing yards with a touchdown.
"I don't even know what happened", Seahawks coach Pete Carroll said of Jefferson.
It was just the latest ugly scene for the National Football League, which handed out punishments last week for excessively rough hits in a game between the Steelers and Bengals and which suspended the Patriots' Rob Gronkowski one game for giving a Bills player a concussion by jumping on him out of frustration after a play had ended.