Cooper crossed the 1,000-yard mark on a 41-yard catch in the third quarter of a 30-20 loss to the Green Bay Packers, becoming the first Oakland receiver to have a 1,000-yard receiving season since Randy Moss in 2005. The 11-season drought had been the longest of any team in the league.
Cooper became the first Oakland rookie to have a 1,000-yard season and is the fourth NFL player to have a 1,000-yard receiving season at age 21 or younger. Cooper turned 21 in June.
Cooper shrugged off the accomplishment.
"I guess it's a good thing to do, but people go for 1,000 yards every year, so it's not really a big thing," Cooper said after the game.
Certain teammates, such as longtime Raiders safety Charles Woodson, praised Cooper, whose potential has been evident from the beginning.
"It's pretty special," Woodson said. "We all knew it when we saw him first coming in to our practices and watched the way he moved around and ran routes, that he was going to be a special guy."
Cooper, a former Alabama star who was the No. 4 overall pick in the 2015 draft, finished the day with 120 yards and a pair of touchdowns on six catches.
Derek Carr, the Raiders' second-year quarterback who has a bright future of his own, said he wasn't surprised that Cooper was unmoved by his milestone.
"He is the ultimate team guy, so that doesn't surprise me that he said that," Carr said. "We have a lot of those guys that will have the same answer. Anytime you can do that in this league against the defensive backs of today, that is no small feat. That means you're a really good wide receiver, one of the best in the world obviously."
Cooper's initial touchdown, a 19-yarder with 20 seconds left in the first half that brought the Raiders within a point, snapped a five-game touchdown drought for Cooper. He scored his second touchdown in the third quarter on a 25-yard catch.